diff --git a/apps/dav/lib/Migration/RemoveOrphanEventsAndContacts.php b/apps/dav/lib/Migration/RemoveOrphanEventsAndContacts.php
index ead2645779bb8..601103f7a24f7 100644
--- a/apps/dav/lib/Migration/RemoveOrphanEventsAndContacts.php
+++ b/apps/dav/lib/Migration/RemoveOrphanEventsAndContacts.php
@@ -77,7 +77,7 @@ protected function removeOrphanChildren($childTable, $parentTable, $parentId): i
 			$qb->delete($childTable)
 				->where($qb->expr()->in('id', $qb->createParameter('ids')));
 
-			$orphanItemsBatch = array_chunk($orphanItems, 200);
+			$orphanItemsBatch = array_chunk($orphanItems, 1000);
 			foreach ($orphanItemsBatch as $items) {
 				$qb->setParameter('ids', $items, IQueryBuilder::PARAM_INT_ARRAY);
 				$qb->executeStatement();