diff --git a/specification/hybridcompute/resource-manager/Microsoft.HybridCompute/stable/2022-12-27/HybridCompute.json b/specification/hybridcompute/resource-manager/Microsoft.HybridCompute/stable/2022-12-27/HybridCompute.json
index 31bde3f3971e..35fe24b6e395 100644
--- a/specification/hybridcompute/resource-manager/Microsoft.HybridCompute/stable/2022-12-27/HybridCompute.json
+++ b/specification/hybridcompute/resource-manager/Microsoft.HybridCompute/stable/2022-12-27/HybridCompute.json
@@ -56,7 +56,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the hybrid machine."
@@ -112,7 +112,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the hybrid machine."
@@ -168,7 +168,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the hybrid machine."
@@ -215,7 +215,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the hybrid machine."
@@ -488,7 +488,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the machine where the extension should be created or updated."
@@ -555,7 +555,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the machine where the extension should be created or updated."
@@ -637,7 +637,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the machine where the extension should be deleted."
@@ -710,7 +710,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the machine containing the extension."
@@ -766,7 +766,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the machine containing the extension."
@@ -831,7 +831,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the hybrid machine."
@@ -1065,7 +1065,7 @@
             "in": "path",
             "required": true,
             "type": "string",
-            "pattern": "[a-zA-Z0-9-_\\.]",
+            "pattern": "^[a-zA-Z0-9-_\\.]{1,54}$",
             "minLength": 1,
             "maxLength": 54,
             "description": "The name of the hybrid machine."
@@ -1712,7 +1712,6 @@
       "type": "object",
       "properties": {
         "properties": {
-          "x-ms-client-flatten": true,
           "$ref": "#/definitions/MachineExtensionProperties",
           "description": "Describes Machine Extension Properties."
         }