fix: subtraction in access_enum

Signed-off-by: Christian Hartmann <[email protected]>

Author: Chartman123

lib/Migration/Version050000Date20241005173955.php

@@ -31,7 +31,10 @@ public function postSchemaChange(IOutput $output, Closure $schemaClosure, array
 		$qbUpdate = $this->db->getQueryBuilder();
 
 		$qbUpdate->update('forms_v2_forms')
-			->set('access_enum', 'access_enum - 3')
+			->set('access_enum', $qbUpdate->func()->subtract(
+				'access_enum',
+				$qbUpdate->createNamedParameter(3, IQueryBuilder::PARAM_INT)
+			))
 			->where($qbUpdate->expr()->gte('access_enum', '3'))
 			->executeStatement();
 	}