diff --git a/fe/fe-core/src/main/java/org/apache/doris/backup/BackupJob.java b/fe/fe-core/src/main/java/org/apache/doris/backup/BackupJob.java
index 55f676ea79e3fd..bebe825479e3c9 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/backup/BackupJob.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/backup/BackupJob.java
@@ -243,7 +243,7 @@ public synchronized boolean finishSnapshotUploadTask(UploadTask task, TFinishTas
 
         taskProgress.remove(task.getSignature());
         Long oldValue = unfinishedTaskIds.remove(task.getSignature());
-        taskErrMsg.remove(task.getTabletId());
+        taskErrMsg.remove(task.getSignature());
         LOG.debug("get finished upload snapshot task, unfinished tasks num: {}, remove result: {}. {}",
                 unfinishedTaskIds.size(), (oldValue != null), this);
         return oldValue != null;