--- Classes/Database/ReferenceIndex.php	2022-11-04 12:48:07.870000000 +0100
+++ Classes/Database/ReferenceIndex.php	2022-11-04 12:50:22.799514929 +0100
@@ -266,7 +266,14 @@
                     if (!is_array($relation)) {
                         continue;
                     }
-                    $relation['hash'] = md5(implode('///', $relation) . '///' . $this->hashVersion);
+
+                    $hashRelation = $relation;
+                    if ($tableName == 'sys_category') {
+                        unset($hashRelation['sorting']);
+                    }
+
+                    $relation['hash'] = md5(implode('///', $hashRelation) . '///' . $this->hashVersion);
+
                     // First, check if already indexed and if so, unset that row (so in the end we know which rows to remove!)
                     if (isset($currentRelationHashes[$relation['hash']])) {
                         unset($currentRelationHashes[$relation['hash']]);