diff --git a/Directory.Packages.props b/Directory.Packages.props
index 731f6aa..f93a749 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -15,22 +15,22 @@
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.10.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageVersion Include="Mutagen.Bethesda.Core">
-      <Version>0.46.0.1-nightly-20240826-095673</Version>
+      <Version>0.46.0.1-nightly-20240827-232520</Version>
     </PackageVersion>
     <PackageVersion Include="Mutagen.Bethesda.Fallout4">
-      <Version>0.46.0.1-nightly-20240826-095673</Version>
+      <Version>0.46.0.1-nightly-20240827-232520</Version>
     </PackageVersion>
     <PackageVersion Include="Mutagen.Bethesda.Skyrim">
-      <Version>0.46.0.1-nightly-20240826-095673</Version>
+      <Version>0.46.0.1-nightly-20240827-232520</Version>
     </PackageVersion>
     <PackageVersion Include="Mutagen.Bethesda.Starfield">
-      <Version>0.46.0.1-nightly-20240826-095673</Version>
+      <Version>0.46.0.1-nightly-20240827-232520</Version>
     </PackageVersion>
     <PackageVersion Include="Mutagen.Bethesda.Oblivion">
-      <Version>0.46.0.1-nightly-20240826-095673</Version>
+      <Version>0.46.0.1-nightly-20240827-232520</Version>
     </PackageVersion>
     <PackageVersion Include="Mutagen.Bethesda.Testing">
-      <Version>0.46.0.1-nightly-20240826-095673</Version>
+      <Version>0.46.0.1-nightly-20240827-232520</Version>
     </PackageVersion>
     <PackageVersion Include="Mutagen.Bethesda.Serialization" Version="[$(Version)]" />
     <PackageVersion Include="Mutagen.Bethesda.Serialization.Newtonsoft" Version="[$(Version)]" />
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/SpecificTests/ModHeaderTests.cs b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/SpecificTests/ModHeaderTests.cs
index 3e1d74d..87b4ee0 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/SpecificTests/ModHeaderTests.cs
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/SpecificTests/ModHeaderTests.cs
@@ -19,6 +19,6 @@ public async Task Test()
         var metaData = new SerializationMetaData(GameRelease.Fallout4, new InlineWorkDropoff(), IFileSystemExt.DefaultFilesystem, NormalFileStreamCreator.Instance, CancellationToken.None);
         var a = await Fallout4ModHeader_Serialization.Deserialize(dataWriter, kernel, metaData);
         a.Stats.NumRecords.Should().Be(0);
-        a.Stats.NextFormID.Should().Be(0x1);
+        a.Stats.NextFormID.Should().Be(0x0);
     }
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid.json.verified.txt
index e007cbf..8909a65 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid.json.verified.txt
@@ -1,4 +1,4 @@
 {
-  "FormKey": "000001:Mod0.esp",
+  "FormKey": "000000:Mod0.esp",
   "EditorID": "TestCell"
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Persistent_Placed2.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Persistent_Placed2.json.verified.txt
index 36e956d..dacc0c9 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Persistent_Placed2.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Persistent_Placed2.json.verified.txt
@@ -1,6 +1,6 @@
 {
   "MutagenObjectType": "PlacedNpc",
-  "FormKey": "000003:Mod0.esp",
+  "FormKey": "000002:Mod0.esp",
   "EditorID": "Placed2",
   "Health": 0.45
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Temporary_Placed1.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Temporary_Placed1.json.verified.txt
index 7fbbc94..02b5cd4 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Temporary_Placed1.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddBlocksToWork_1_6_TestEdid_Temporary_Placed1.json.verified.txt
@@ -1,6 +1,6 @@
 {
   "MutagenObjectType": "PlacedNpc",
-  "FormKey": "000002:Mod0.esp",
+  "FormKey": "000001:Mod0.esp",
   "EditorID": "Placed1",
   "Health": 0.23
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCellRecordData.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCellRecordData.json.verified.txt
index faa585b..448e11f 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCellRecordData.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCellRecordData.json.verified.txt
@@ -1,4 +1,4 @@
 {
-  "FormKey": "000002:modKey.esp",
+  "FormKey": "000001:modKey.esp",
   "EditorID": "TestCell"
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt
index 946e083..d829691 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt
@@ -1,6 +1,6 @@
 {
   "MutagenObjectType": "PlacedNpc",
-  "FormKey": "000004:modKey.esp",
+  "FormKey": "000003:modKey.esp",
   "EditorID": "Placed2",
   "Health": 0.45
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt
index 2d25508..627004f 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt
@@ -1,6 +1,6 @@
 {
   "MutagenObjectType": "PlacedNpc",
-  "FormKey": "000003:modKey.esp",
+  "FormKey": "000002:modKey.esp",
   "EditorID": "Placed1",
   "Health": 0.23
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_GroupRecordData.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_GroupRecordData.json.verified.txt
index 37d9017..c7cfe04 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_GroupRecordData.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/AddXYBlocksToWork_GroupRecordData.json.verified.txt
@@ -1,5 +1,5 @@
 {
-  "FormKey": "000001:modKey.esp",
+  "FormKey": "000000:modKey.esp",
   "EditorID": "MyWorldspace",
   "SubCellsTimestamp": 123
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/BlockSerializationTests.cs b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/BlockSerializationTests.cs
index 6cb12b4..1e101d1 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/BlockSerializationTests.cs
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/BlockSerializationTests.cs
@@ -134,23 +134,23 @@ await SerializationHelper.AddBlocksToWork<NewtonsoftJsonSerializationWriterKerne
         settings.UseFileName($"{nameof(AddBlocksToWork)}_1_6_GroupRecordData.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(oneSixHeaderDataPath), settings);
         
-        var cellDirPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000001_Mod0.esp");
+        var cellDirPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000000_Mod0.esp");
         fileSystem.Directory.Exists(cellDirPath).Should().BeTrue();
-        var cellPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000001_Mod0.esp", "RecordData.json");
+        var cellPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000000_Mod0.esp", "RecordData.json");
         fileSystem.File.Exists(cellPath).Should().BeTrue();
         settings.UseFileName($"{nameof(AddBlocksToWork)}_1_6_TestEdid.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(cellPath), settings);
         
-        var tempPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000001_Mod0.esp", "Temporary");
+        var tempPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000000_Mod0.esp", "Temporary");
         fileSystem.Directory.Exists(tempPath).Should().BeTrue();
-        var placed1Path = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000001_Mod0.esp", "Temporary", "[0] Placed1 - 000002_Mod0.esp.json");
+        var placed1Path = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000000_Mod0.esp", "Temporary", "[0] Placed1 - 000001_Mod0.esp.json");
         fileSystem.File.Exists(placed1Path).Should().BeTrue();
         settings.UseFileName($"{nameof(AddBlocksToWork)}_1_6_TestEdid_Temporary_Placed1.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(placed1Path), settings);
         
-        var perstPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000001_Mod0.esp", "Persistent");
+        var perstPath = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000000_Mod0.esp", "Persistent");
         fileSystem.Directory.Exists(perstPath).Should().BeTrue();
-        var placed2Path = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000001_Mod0.esp", "Persistent", "[0] Placed2 - 000003_Mod0.esp.json");
+        var placed2Path = Path.Combine(existingDir, "Cells", "[0] 1", "[1] 6", "[0] TestCell - 000000_Mod0.esp", "Persistent", "[0] Placed2 - 000002_Mod0.esp.json");
         fileSystem.File.Exists(placed2Path).Should().BeTrue();
         settings.UseFileName($"{nameof(AddBlocksToWork)}_1_6_TestEdid_Persistent_Placed2.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(placed2Path), settings);
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCellRecordData.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCellRecordData.json.verified.txt
index 051e467..3fc77f1 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCellRecordData.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCellRecordData.json.verified.txt
@@ -1,4 +1,4 @@
 {
-  "FormKey": "000002:modKey.esp",
+  "FormKey": "000001:modKey.esp",
   "EditorID": "TestCell"
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt
index ed1185b..93db48f 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Persistent_Placed2.json.verified.txt
@@ -1,6 +1,6 @@
 {
   "MutagenObjectType": "PlacedNpc",
-  "FormKey": "000004:modKey.esp",
+  "FormKey": "000003:modKey.esp",
   "EditorID": "Placed2",
   "Health": 0.45
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt
index 2d25508..627004f 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_4_5_6_4_TestCell_Temporary_Placed1.json.verified.txt
@@ -1,6 +1,6 @@
 {
   "MutagenObjectType": "PlacedNpc",
-  "FormKey": "000003:modKey.esp",
+  "FormKey": "000002:modKey.esp",
   "EditorID": "Placed1",
   "Health": 0.23
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_GroupRecordData.json.verified.txt b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_GroupRecordData.json.verified.txt
index 37d9017..c7cfe04 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_GroupRecordData.json.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/TopLevelRecord_GroupRecordData.json.verified.txt
@@ -1,5 +1,5 @@
 {
-  "FormKey": "000001:modKey.esp",
+  "FormKey": "000000:modKey.esp",
   "EditorID": "MyWorldspace",
   "SubCellsTimestamp": 123
 }
\ No newline at end of file
diff --git a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/XYBlockSerializationTests.cs b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/XYBlockSerializationTests.cs
index 038dadb..1c2f2be 100644
--- a/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/XYBlockSerializationTests.cs
+++ b/Mutagen.Bethesda.Serialization.Tester.FolderSplit/UtilityTests/XYBlockSerializationTests.cs
@@ -115,59 +115,59 @@ await SerializationHelper.AddXYBlocksToWork<NewtonsoftJsonSerializationWriterKer
             withNumbering: true);
         
         fileSystem.Directory.Exists(Path.Combine(existingDir, "Worldspaces")).Should().BeTrue();
-        fileSystem.Directory.Exists(Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp")).Should().BeTrue();
+        fileSystem.Directory.Exists(Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp")).Should().BeTrue();
         
-        var headerDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "RecordData.json");
+        var headerDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "RecordData.json");
         fileSystem.File.Exists(headerDataPath).Should().BeTrue();
         var settings = new VerifySettings();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_GroupRecordData.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(headerDataPath), settings);
         
-        var fourFiveFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5");
+        var fourFiveFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5");
         fileSystem.Directory.Exists(fourFiveFolder).Should().BeTrue();
-        var fourFiveHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5", "GroupRecordData.json");
+        var fourFiveHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5", "GroupRecordData.json");
         fileSystem.File.Exists(fourFiveHeaderDataPath).Should().BeTrue();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_4_5_GroupRecordData.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(fourFiveHeaderDataPath), settings);
 
-        var fourSixFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[1] 4, 6");
+        var fourSixFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[1] 4, 6");
         fileSystem.Directory.Exists(fourSixFolder).Should().BeTrue();
-        var fourSixHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[1] 4, 6", "GroupRecordData.json");
+        var fourSixHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[1] 4, 6", "GroupRecordData.json");
         fileSystem.File.Exists(fourSixHeaderDataPath).Should().BeTrue();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_4_6_GroupRecordData.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(fourSixHeaderDataPath), settings);
         
-        var fourFiveThreeNineFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5", "[0] 3, 9");
+        var fourFiveThreeNineFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5", "[0] 3, 9");
         fileSystem.Directory.Exists(fourFiveThreeNineFolder).Should().BeTrue();
-        var fourFiveThreeNineHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5", "[0] 3, 9", "GroupRecordData.json");
+        var fourFiveThreeNineHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5", "[0] 3, 9", "GroupRecordData.json");
         fileSystem.File.Exists(fourFiveThreeNineHeaderDataPath).Should().BeTrue();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_4_5_3_9_GroupRecordData.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(fourFiveThreeNineHeaderDataPath), settings);
         
-        var fourFiveSixFourFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5", "[1] 6, 4");
+        var fourFiveSixFourFolder = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5", "[1] 6, 4");
         fileSystem.Directory.Exists(fourFiveSixFourFolder).Should().BeTrue();
-        var fourFiveSixFourHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5", "[1] 6, 4", "GroupRecordData.json");
+        var fourFiveSixFourHeaderDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5", "[1] 6, 4", "GroupRecordData.json");
         fileSystem.File.Exists(fourFiveSixFourHeaderDataPath).Should().BeTrue();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_4_5_6_4_GroupRecordData.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(fourFiveSixFourHeaderDataPath), settings);
         
-        var cellDirPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5", "[1] 6, 4", "[0] TestCell - 000002_modKey.esp");
+        var cellDirPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5", "[1] 6, 4", "[0] TestCell - 000001_modKey.esp");
         fileSystem.Directory.Exists(cellDirPath).Should().BeTrue();
-        var cellDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000001_modKey.esp", "[0] 4, 5", "[1] 6, 4", "[0] TestCell - 000002_modKey.esp", "RecordData.json");
+        var cellDataPath = Path.Combine(existingDir, "Worldspaces", "[0] MyWorldspace - 000000_modKey.esp", "[0] 4, 5", "[1] 6, 4", "[0] TestCell - 000001_modKey.esp", "RecordData.json");
         fileSystem.File.Exists(cellDataPath).Should().BeTrue();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_4_5_6_4_TestCellRecordData.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(cellDataPath), settings);
 
         var tempPath = Path.Combine(cellDirPath, "Temporary");
         fileSystem.Directory.Exists(tempPath).Should().BeTrue();
-        var placed1Path = Path.Combine(tempPath, "[0] Placed1 - 000003_modKey.esp.json");
+        var placed1Path = Path.Combine(tempPath, "[0] Placed1 - 000002_modKey.esp.json");
         fileSystem.File.Exists(placed1Path).Should().BeTrue();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_4_5_6_4_TestCell_Temporary_Placed1.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(placed1Path), settings);
         
         var persistentPath = Path.Combine(cellDirPath, "Persistent");
         fileSystem.Directory.Exists(persistentPath).Should().BeTrue();
-        var placed2Path = Path.Combine(persistentPath, "[0] Placed2 - 000004_modKey.esp.json");
+        var placed2Path = Path.Combine(persistentPath, "[0] Placed2 - 000003_modKey.esp.json");
         fileSystem.File.Exists(placed2Path).Should().BeTrue();
         settings.UseFileName($"{nameof(AddXYBlocksToWork)}_4_5_6_4_TestCell_Persistent_Placed2.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(placed2Path), settings);
@@ -259,14 +259,14 @@ await SerializationHelper.AddXYBlocksToWork<NewtonsoftJsonSerializationWriterKer
 
         var tempPath = Path.Combine(cellDirPath, "Temporary");
         fileSystem.Directory.Exists(tempPath).Should().BeTrue();
-        var placed1Path = Path.Combine(tempPath, "[0] Placed1 - 000003_modKey.esp.json");
+        var placed1Path = Path.Combine(tempPath, "[0] Placed1 - 000002_modKey.esp.json");
         fileSystem.File.Exists(placed1Path).Should().BeTrue();
         settings.UseFileName($"{nameof(TopLevelRecord)}_4_5_6_4_TestCell_Temporary_Placed1.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(placed1Path), settings);
         
         var persistentPath = Path.Combine(cellDirPath, "Persistent");
         fileSystem.Directory.Exists(persistentPath).Should().BeTrue();
-        var placed2Path = Path.Combine(persistentPath, "[0] Placed2 - 000004_modKey.esp.json");
+        var placed2Path = Path.Combine(persistentPath, "[0] Placed2 - 000003_modKey.esp.json");
         fileSystem.File.Exists(placed2Path).Should().BeTrue();
         settings.UseFileName($"{nameof(TopLevelRecord)}_4_5_6_4_TestCell_Persistent_Placed2.json");
         await Verifier.Verify(fileSystem.File.ReadAllText(placed2Path), settings);
diff --git a/Mutagen.Bethesda.Serialization.Tester.NoCustomization/NewtonsoftSerializationTests.SingleGroupFallout4ModExport.verified.txt b/Mutagen.Bethesda.Serialization.Tester.NoCustomization/NewtonsoftSerializationTests.SingleGroupFallout4ModExport.verified.txt
index a18b115..5930e57 100644
--- a/Mutagen.Bethesda.Serialization.Tester.NoCustomization/NewtonsoftSerializationTests.SingleGroupFallout4ModExport.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.NoCustomization/NewtonsoftSerializationTests.SingleGroupFallout4ModExport.verified.txt
@@ -3,13 +3,13 @@
   "GameRelease": "Fallout4",
   "ModHeader": {
     "Stats": {
-      "NextFormID": 3
+      "NextFormID": 2
     }
   },
   "Npcs": {
     "Records": [
       {
-        "FormKey": "000001:InputMod.esp",
+        "FormKey": "000000:InputMod.esp",
         "Level": {
           "MutagenObjectType": "PcLevelMult",
           "LevelMult": 1.3
@@ -20,7 +20,7 @@
         }
       },
       {
-        "FormKey": "000002:InputMod.esp",
+        "FormKey": "000001:InputMod.esp",
         "Level": {
           "MutagenObjectType": "NpcLevel"
         },
diff --git a/Mutagen.Bethesda.Serialization.Tester.NoCustomization/YamlSerializationTests.SingleGroupFallout4ModExport.verified.txt b/Mutagen.Bethesda.Serialization.Tester.NoCustomization/YamlSerializationTests.SingleGroupFallout4ModExport.verified.txt
index 4a594d3..5e12d61 100644
--- a/Mutagen.Bethesda.Serialization.Tester.NoCustomization/YamlSerializationTests.SingleGroupFallout4ModExport.verified.txt
+++ b/Mutagen.Bethesda.Serialization.Tester.NoCustomization/YamlSerializationTests.SingleGroupFallout4ModExport.verified.txt
@@ -2,17 +2,17 @@ ModKey: InputMod.esp
 GameRelease: Fallout4
 ModHeader:
   Stats:
-    NextFormID: 3
+    NextFormID: 2
 Npcs:
   Records:
-  - FormKey: 000001:InputMod.esp
+  - FormKey: 000000:InputMod.esp
     Level:
       MutagenObjectType: PcLevelMult
       LevelMult: 1.3
     Name:
       TargetLanguage: English
       Value: Goblin
-  - FormKey: 000002:InputMod.esp
+  - FormKey: 000001:InputMod.esp
     Level:
       MutagenObjectType: NpcLevel
     Attacks: