[BUGFIX] Fix wrongly checked language overlay in backend service

Classes/Hook/TceMainHook.php

@@ -274,6 +274,10 @@ class TceMainHook {
 	 * @internal param object $this
 	 */
 	public function checkRecordUpdateAccess($table, $id, $data, $res, $tcemain): ?int {
+		if (!BackendServices::isSupportedTable($table)) {
+			return $res;
+		}
+
 		$queryBuilder = GeneralUtility::makeInstance(ConnectionPool::class)->getQueryBuilderForTable($table);
 		$queryBuilder->getRestrictions()->removeAll()->add(GeneralUtility::makeInstance(DeletedRestriction::class));
 		$row = $queryBuilder->select('*')

Classes/Service/BackendServices.php

@@ -113,7 +113,7 @@ class BackendServices extends AbstractServices {
 			if ($tanslationIdField !== '') {
 				// if the field which points to the original of the translation is
 				// not 0 a translation exists and we have an overlay record
-				$result = (int) $row[$tanslationIdField][0] !== 0;
+				$result = $row[$tanslationIdField] !== 0;
 			}
 		}