diff --git a/lib/Migration/Version000000Date20220316165602.php b/lib/Migration/Version000000Date20220316165602.php
index 3605788..7e8d642 100644
--- a/lib/Migration/Version000000Date20220316165602.php
+++ b/lib/Migration/Version000000Date20220316165602.php
@@ -23,29 +23,28 @@ class Version000000Date20220316165602 extends SimpleMigrationStep {
 	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
 		$schema = $schemaClosure();
 
-		if (!$schema->hasTable('bbb_restrictions') && !$schema->hasTable('bbb_rooms')) {
-			return null;
+		if ($schema->hasTable('bbb_rooms')) {
+			$table = $schema->getTable('bbb_rooms');
+
+			if (!$table->hasColumn('logout_u_r_l')) {
+				$table->addColumn('logout_u_r_l', 'string', [
+					'notnull' => false,
+					'length' => 200
+				]);
+			}
 		}
 
-		$table = $schema->getTable('bbb_restrictions');
+		if ($schema->hasTable('bbb_restrictions')) {
+			$table = $schema->getTable('bbb_restrictions');
 
-		if (!$table->hasColumn('allow_logout_u_r_l')) {
-			$table->addColumn('allow_logout_u_r_l', 'boolean', [
-				'notnull' => false,
-				'default' => false
-			]);
-		}
-
-		$table = $schema->getTable('bbb_rooms');
-
-		if (!$table->hasColumn('logout_u_r_l')) {
-			$table->addColumn('logout_u_r_l', 'string', [
-				'notnull' => false,
-				'length' => 200
-			]);
+			if (!$table->hasColumn('allow_logout_u_r_l')) {
+				$table->addColumn('allow_logout_u_r_l', 'boolean', [
+					'notnull' => false,
+					'default' => false
+				]);
+			}
 		}
 
 		return $schema;
-
 	}
 }