diff --git a/lib/Migration/Version1000Date20200306161713.php b/lib/Migration/Version1000Date20200306161713.php
index a9ce3b104..a4ed0ebce 100644
--- a/lib/Migration/Version1000Date20200306161713.php
+++ b/lib/Migration/Version1000Date20200306161713.php
@@ -271,7 +271,7 @@ class Version1000Date20200306161713 extends SimpleMigrationStep {
 			]);
 			$table->setPrimaryKey(['id']);
 			$table->addIndex(['participant'], 'deck_assigned_users_idx_p');
-			$table->addIndex(['card_id'], 'deck_assigned_users_idx_c');
+			//$table->addIndex(['card_id'], 'deck_assigned_users_idx_c');
 		}
 
 		if (!$schema->hasTable('deck_board_acl')) {
@@ -307,7 +307,7 @@ class Version1000Date20200306161713 extends SimpleMigrationStep {
 			]);
 			$table->setPrimaryKey(['id']);
 			$table->addUniqueIndex(['board_id', 'type', 'participant'], 'deck_board_acl_uq_i');
-			$table->addIndex(['board_id'], 'deck_board_acl_idx_i');
+			//$table->addIndex(['board_id'], 'deck_board_acl_idx_i');
 		}
 		return $schema;
 	}
diff --git a/lib/Migration/Version11000Date20240222115515.php b/lib/Migration/Version11000Date20240222115515.php
index 77e3da918..bef482128 100644
--- a/lib/Migration/Version11000Date20240222115515.php
+++ b/lib/Migration/Version11000Date20240222115515.php
@@ -1,22 +1,7 @@
 <?php
 /**
- * @copyright Copyright (c) 2022, chandi Langecker (git@chandi.it)
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
+ * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
 declare(strict_types=1);
@@ -26,23 +11,25 @@ namespace OCA\Deck\Migration;
 
 use Closure;
 use OCP\DB\ISchemaWrapper;
-use OCP\DB\Types;
 use OCP\Migration\IOutput;
 use OCP\Migration\SimpleMigrationStep;
 
 class Version11000Date20240222115515 extends SimpleMigrationStep {
 	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
 		$schema = $schemaClosure();
+		$returnValue = null;
 
-		$assigned_users_table = $schema->getTable('deck_assigned_users');
-		if($assigned_users_table->hasIndex('deck_assigned_users_idx_c')) {
-			$assigned_users_table->dropIndex('deck_assigned_users_idx_c');
+		$assignedUsersTable = $schema->getTable('deck_assigned_users');
+		if($assignedUsersTable->hasIndex('deck_assigned_users_idx_c')) {
+			$assignedUsersTable->dropIndex('deck_assigned_users_idx_c');
+			$returnValue = $schema;
 		}
 
-		$board_acl_table = $schema->getTable('deck_board_acl');
-		if($board_acl_table->hasIndex('deck_board_acl_idx_i')) {
-			$board_acl_table->dropIndex('deck_board_acl_idx_i');
+		$boardAclTable = $schema->getTable('deck_board_acl');
+		if($boardAclTable->hasIndex('deck_board_acl_idx_i')) {
+			$boardAclTable->dropIndex('deck_board_acl_idx_i');
+			$returnValue = $schema;
 		}
-		return $schema;
+		return $returnValue;
 	}
 }