diff --git a/database/migrations/2025_09_11_133311_create_product_characteristics_masters_table.php b/database/migrations/2025_09_11_133311_create_product_characteristics_masters_table.php
index 91e8938..f906fae 100644
--- a/database/migrations/2025_09_11_133311_create_product_characteristics_masters_table.php
+++ b/database/migrations/2025_09_11_133311_create_product_characteristics_masters_table.php
@@ -1,7 +1,6 @@
 <?php
 
 use Illuminate\Database\Migrations\Migration;
-use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
 
 return new class extends Migration
@@ -9,7 +8,6 @@ return new class extends Migration
     /**
      * Run the migrations.
      */
-
     public function up(): void
     {
         $sql = <<<'SQL'
@@ -25,7 +23,7 @@ return new class extends Migration
                 characteristics_type                TEXT DEFAULT NULL
                 upper								DOUBLE PRECISION DEFAULT 0.0,
                 lower								DOUBLE PRECISION DEFAULT 0.0,
-                middle								DOUBLE PRECISION DEFAULT NULL,
+                middle								DOUBLE PRECISION DEFAULT 0.0,
                 created_at							TIMESTAMP NOT NULL DEFAULT NOW(),
                 updated_at							TIMESTAMP NOT NULL DEFAULT NOW(),
                 created_by							TEXT DEFAULT NULL,
@@ -42,7 +40,6 @@ return new class extends Migration
         DB::statement($sql);
     }
 
-
     /**
      * Reverse the migrations.
      */