Merge pull request #18587 from taosdata/fix/TD-20857

refactor(sync): if already start, force close snapshot receiver

source/libs/sync/src/syncSnapshot.c

@@ -541,6 +541,10 @@ _START_RECEIVER:
       taosMsleep(10);
     }
 
+    if (snapshotReceiverIsStart(pReceiver)) {
+      snapshotReceiverForceStop(pReceiver);
+    }
+
     snapshotReceiverStart(pReceiver, pMsg);  // set start-time same with sender
   }