Added migration file for allowing null value in shift_id column in table production plans

database/migrations/2026_02_19_122458_alter_shift_id_column_to_production_plans.php

@@ -0,0 +1,29 @@
+<?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
+    {
+        DB::statement("
+            ALTER TABLE production_plans
+            ALTER COLUMN shift_id DROP NOT NULL
+        ");
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Schema::table('production_plans', function (Blueprint $table) {
+        //     //
+        // });
+    }
+};