add optional migration to remove not needed tables + readme

README.md

@@ -39,3 +39,7 @@ Module configuration
 ]
 ```
 
+Upgrading
+---
+
+When upgrading von v2 to v3 run this migration: `yii migrate/up -p=@vendor/dmstr/yii2-resque-module/src/migrations/2.0-to-3.0`

src/migrations/2.0-to-3.0/m241018_114631_drop_queue_manager_table.php

@@ -0,0 +1,30 @@
+<?php
+
+use yii\db\Migration;
+
+/**
+ * Handles the dropping of table `{{%queue_manager}}`.
+ */
+class m241018_114631_drop_queue_manager_table extends Migration
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function up()
+    {
+        $tableName = '{{%queue_manager}}';
+        // Check if the table exists before dropping
+        if ($this->db->schema->getTableSchema($tableName, true) !== null) {
+            $this->dropTable($tableName);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function down()
+    {
+        echo "m241018_114631_drop_queue_manager_table cannot be reverted.\n";
+        return false;
+    }
+}