diff --git a/include/libs/sync/sync.h b/include/libs/sync/sync.h
index 9a6d42e5bda5016fc416c115940d3c3012cca548..8f83e21ce4ee845c49084e86838a3a35c95d7592 100644
--- a/include/libs/sync/sync.h
+++ b/include/libs/sync/sync.h
@@ -91,6 +91,7 @@ typedef struct SSnapshot {
   void*     data;
   SyncIndex lastApplyIndex;
   SyncTerm  lastApplyTerm;
+  SyncIndex lastConfigIndex;
 } SSnapshot;
 
 typedef struct SSyncFSM {
diff --git a/source/libs/sync/src/syncAppendEntries.c b/source/libs/sync/src/syncAppendEntries.c
index 0683e1d97576066dd69e28ee9adb324bb9cd9ad0..97600c3f15e4caf21c7b8356dd97d98e86effde4 100644
--- a/source/libs/sync/src/syncAppendEntries.c
+++ b/source/libs/sync/src/syncAppendEntries.c
@@ -438,9 +438,12 @@ static bool syncNodeOnAppendEntriesLogOK(SSyncNode* pSyncNode, SyncAppendEntries
     return true;
   }
 
-  SyncTerm  myPreLogTerm = syncNodeGetPreTerm(pSyncNode, pMsg->prevLogIndex + 1);
   SyncIndex myLastIndex = syncNodeGetLastIndex(pSyncNode);
+  if (pMsg->prevLogIndex > myLastIndex) {
+    return false;
+  }
 
+  SyncTerm myPreLogTerm = syncNodeGetPreTerm(pSyncNode, pMsg->prevLogIndex + 1);
   if (pMsg->prevLogIndex <= myLastIndex && pMsg->prevLogTerm == myPreLogTerm) {
     return true;
   }
diff --git a/source/libs/sync/src/syncRaftLog.c b/source/libs/sync/src/syncRaftLog.c
index b021c3bf590b6df8374bf47a8f1dc5f49f4eb255..95f5926a6f8ae2dd7945fa10a1744686e6c0059d 100644
--- a/source/libs/sync/src/syncRaftLog.c
+++ b/source/libs/sync/src/syncRaftLog.c
@@ -198,7 +198,7 @@ static int32_t raftLogGetEntry(struct SSyncLogStore* pLogStore, SyncIndex index,
 
   } else {
     // index not in range
-    code = -2;
+    code = 0;
   }
 
   return code;