diff --git a/flink-doris-connector/src/main/java/org/apache/doris/flink/sink/writer/LabelGenerator.java b/flink-doris-connector/src/main/java/org/apache/doris/flink/sink/writer/LabelGenerator.java
index 35edae9e2..235b553d0 100644
--- a/flink-doris-connector/src/main/java/org/apache/doris/flink/sink/writer/LabelGenerator.java
+++ b/flink-doris-connector/src/main/java/org/apache/doris/flink/sink/writer/LabelGenerator.java
@@ -31,7 +31,8 @@ public LabelGenerator(String labelPrefix, boolean enable2PC) {
     }
 
     public String generateLabel(long chkId) {
-        return enable2PC ? labelPrefix + "_" + chkId : labelPrefix + "_" + UUID.randomUUID();
+        String label = labelPrefix + "_" + chkId;
+        return enable2PC ? label : label + "_" + UUID.randomUUID();
     }
 
     public String generateBatchLabel() {