core/modules/editor/editor.module | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/editor/editor.module b/core/modules/editor/editor.module
index f181ef1..08f1711 100644
--- a/core/modules/editor/editor.module
+++ b/core/modules/editor/editor.module
@@ -393,7 +393,7 @@ function editor_entity_update(EntityInterface $entity) {
 
     // Detect file usages that should be decremented.
     foreach ($original_uuids_by_field as $field => $uuids) {
-      $removed_files = array_diff($original_uuids_by_field[$field], $uuids_by_field[$field]);
+      $removed_files = DiffArray::diffOnce($original_uuids_by_field[$field], $uuids_by_field[$field]);
       _editor_delete_file_usage($removed_files, $entity, 1);
     }
   }