diff --git a/database/migrations/2024_08_03_080116_create_bill_bill_table.php b/database/migrations/2024_08_03_080116_create_bill_bill_table.php
index d7952d0..47314bf 100644
--- a/database/migrations/2024_08_03_080116_create_bill_bill_table.php
+++ b/database/migrations/2024_08_03_080116_create_bill_bill_table.php
@@ -16,7 +16,7 @@ public function up(): void
 
             $table->string('title');
             $table->char('bill_no', 100);
-            $table->foreignId('partner_id')->constrained('partner_partner')->onDelete('cascade')->index('bill_bill_partner_id');
+            $table->foreignId('partner_id')->nullable()->constrained('partner_partner')->onDelete('set null');
             $table->date('due_date');
             $table->string('module')->default('Account');
             $table->string('model')->default('Invoice');
@@ -25,7 +25,12 @@ public function up(): void
             $table->tinyInteger('is_posted')->default(0);
             $table->decimal('total', 20, 2)->nullable();
 
+            $table->foreignId('created_by')->nullable()->constrained('users')->onDelete('set null');
+            $table->foreignId('updated_by')->nullable()->constrained('users')->onDelete('set null');
+            $table->foreignId('deleted_by')->nullable()->constrained('users')->onDelete('set null');
+
             $table->timestamps();
+            $table->softDeletes();
         });
     }
 
diff --git a/database/migrations/2024_08_03_080127_create_bill_item_table.php b/database/migrations/2024_08_03_080127_create_bill_item_table.php
index 0e1ca27..0ae5488 100644
--- a/database/migrations/2024_08_03_080127_create_bill_item_table.php
+++ b/database/migrations/2024_08_03_080127_create_bill_item_table.php
@@ -15,8 +15,8 @@ public function up(): void
             $table->id();
 
             $table->string('title');
-            $table->foreignId('bill_id')->constrained('bill_bill')->onDelete('cascade')->index('bill_bill_bill_id');
-            $table->foreignId('ledger_id')->constrained('account_ledger')->onDelete('cascade')->index('bill_bill_ledger_id');
+            $table->foreignId('bill_id')->nullable()->constrained('bill_bill')->onDelete('set null');
+            $table->foreignId('ledger_id')->nullable()->constrained('account_ledger')->onDelete('set null');
             $table->decimal('price', 20, 2)->default(0.00);
             $table->decimal('amount', 20, 2)->default(0.00);
             $table->string('module')->nullable();
@@ -24,7 +24,12 @@ public function up(): void
             $table->bigInteger('item_id')->nullable();
             $table->integer('quantity')->nullable();
 
+            $table->foreignId('created_by')->nullable()->constrained('users')->onDelete('set null');
+            $table->foreignId('updated_by')->nullable()->constrained('users')->onDelete('set null');
+            $table->foreignId('deleted_by')->nullable()->constrained('users')->onDelete('set null');
+
             $table->timestamps();
+            $table->softDeletes();
         });
     }
 
diff --git a/database/migrations/2024_08_03_080133_create_bill_item_rate_table.php b/database/migrations/2024_08_03_080133_create_bill_item_rate_table.php
index adf50ad..e5e75f8 100644
--- a/database/migrations/2024_08_03_080133_create_bill_item_rate_table.php
+++ b/database/migrations/2024_08_03_080133_create_bill_item_rate_table.php
@@ -16,15 +16,20 @@ public function up(): void
 
             $table->string('title');
             $table->string('slug');
-            $table->foreignId('rate_id')->constrained('account_rate')->onDelete('cascade')->index('bill_item_rate_rate_id');
-            $table->foreignId('bill_item_id')->constrained('bill_item')->onDelete('cascade')->index('bill_item_rate_bill_item_id');
+            $table->foreignId('rate_id')->nullable()->constrained('account_rate')->onDelete('set null');
+            $table->foreignId('bill_item_id')->nullable()->constrained('bill_item')->onDelete('set null');
             $table->enum('method', ['+', '+%', '-', '-%'])->default('+');
             $table->decimal('value', 20, 2)->default(0.00);
             $table->string('params')->nullable();
             $table->tinyInteger('ordering')->nullable();
             $table->tinyInteger('on_total')->default(false);
 
+            $table->foreignId('created_by')->nullable()->constrained('users')->onDelete('set null');
+            $table->foreignId('updated_by')->nullable()->constrained('users')->onDelete('set null');
+            $table->foreignId('deleted_by')->nullable()->constrained('users')->onDelete('set null');
+
             $table->timestamps();
+            $table->softDeletes();
         });
     }
 
diff --git a/database/migrations/2024_09_03_132429_add_deleted_at_to_bill_bill_table.php b/database/migrations/2024_09_03_132429_add_deleted_at_to_bill_bill_table.php
deleted file mode 100644
index 8caa38b..0000000
--- a/database/migrations/2024_09_03_132429_add_deleted_at_to_bill_bill_table.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
-use Illuminate\Support\Facades\Schema;
-
-return new class extends Migration
-{
-    /**
-     * Run the migrations.
-     */
-    public function up(): void
-    {
-        Schema::table('bill_bill', function (Blueprint $table) {
-            $table->softDeletes();
-        });
-    }
-
-    /**
-     * Reverse the migrations.
-     */
-    public function down(): void
-    {
-        Schema::table('bill_bill', function (Blueprint $table) {
-            $table->dropColumn('deleted_at');
-        });
-    }
-};
diff --git a/database/migrations/2024_09_03_132436_add_deleted_at_to_bill_item_table.php b/database/migrations/2024_09_03_132436_add_deleted_at_to_bill_item_table.php
deleted file mode 100644
index 53919b0..0000000
--- a/database/migrations/2024_09_03_132436_add_deleted_at_to_bill_item_table.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
-use Illuminate\Support\Facades\Schema;
-
-return new class extends Migration
-{
-    /**
-     * Run the migrations.
-     */
-    public function up(): void
-    {
-        Schema::table('bill_item', function (Blueprint $table) {
-            $table->softDeletes();
-        });
-    }
-
-    /**
-     * Reverse the migrations.
-     */
-    public function down(): void
-    {
-        Schema::table('bill_item', function (Blueprint $table) {
-            $table->dropColumn('deleted_at');
-        });
-    }
-};
diff --git a/database/migrations/2024_09_03_132441_add_deleted_at_to_bill_item_rate_table.php b/database/migrations/2024_09_03_132441_add_deleted_at_to_bill_item_rate_table.php
deleted file mode 100644
index b0b2f5a..0000000
--- a/database/migrations/2024_09_03_132441_add_deleted_at_to_bill_item_rate_table.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
-use Illuminate\Support\Facades\Schema;
-
-return new class extends Migration
-{
-    /**
-     * Run the migrations.
-     */
-    public function up(): void
-    {
-        Schema::table('bill_item_rate', function (Blueprint $table) {
-            $table->softDeletes();
-        });
-    }
-
-    /**
-     * Reverse the migrations.
-     */
-    public function down(): void
-    {
-        Schema::table('bill_item_rate', function (Blueprint $table) {
-            $table->dropColumn('deleted_at');
-        });
-    }
-};