diff --git a/src/tsdb/src/tsdbFile.c b/src/tsdb/src/tsdbFile.c
index b1228b0230537874442f3dc6fa5d497a13c9cfa6..ad98bb7b207cc363b6bfa97e1ac46b87e3c4f43e 100644
--- a/src/tsdb/src/tsdbFile.c
+++ b/src/tsdb/src/tsdbFile.c
@@ -178,7 +178,7 @@ void tsdbFitRetention(STsdbRepo *pRepo) {
   SFileGroup *pGroup = pFileH->fGroup;
 
   int mfid =
-      tsdbGetKeyFileId(taosGetTimestamp(pRepo->config.precision), pRepo->config.daysPerFile, pRepo->config.precision);
+      tsdbGetKeyFileId(taosGetTimestamp(pRepo->config.precision), pRepo->config.daysPerFile, pRepo->config.precision) - pFileH->maxFGroups + 3;
 
   while (pFileH->numOfFGroups > 0 && pGroup[0].fileId < mfid) {
     tsdbRemoveFileGroup(pFileH, pGroup[0].fileId);