diff --git a/driver/src/main/java/com/alibaba/otter/canal/parse/driver/mysql/packets/UUIDSet.java b/driver/src/main/java/com/alibaba/otter/canal/parse/driver/mysql/packets/UUIDSet.java
index 5926a4fa..0eaea9cd 100644
--- a/driver/src/main/java/com/alibaba/otter/canal/parse/driver/mysql/packets/UUIDSet.java
+++ b/driver/src/main/java/com/alibaba/otter/canal/parse/driver/mysql/packets/UUIDSet.java
@@ -181,9 +181,7 @@ public class UUIDSet {
             int j;
             for (j = i + 1; j < len; j++) {
                 if (intervals.get(i).stop >= intervals.get(j).start) {
-                    if (intervals.get(i).stop < intervals.get(j).stop) {
-                        intervals.get(i).stop = intervals.get(j).stop;
-                    }
+                    intervals.get(i).stop = intervals.get(j).stop;
                 } else {
                     break;
                 }
diff --git a/driver/src/test/java/com/alibaba/otter/canal/parse/driver/mysql/MysqlGTIDSetTest.java b/driver/src/test/java/com/alibaba/otter/canal/parse/driver/mysql/MysqlGTIDSetTest.java
index bf29f7d9..1c8ba0e9 100644
--- a/driver/src/test/java/com/alibaba/otter/canal/parse/driver/mysql/MysqlGTIDSetTest.java
+++ b/driver/src/test/java/com/alibaba/otter/canal/parse/driver/mysql/MysqlGTIDSetTest.java
@@ -42,10 +42,9 @@ public class MysqlGTIDSetTest {
         MysqlGTIDSet mysqlGTIDSet1 = MysqlGTIDSet.parse(gtid1);
 
         String gtid2 = "726757ad-4455-11e8-ae04-0242ac110002:1-20304074";
-        MysqlGTIDSet mysqlGTIDSet2 = MysqlGTIDSet.parse(gtid2);
 
         mysqlGTIDSet1.update(gtid2);
-        assertEquals("726757ad-4455-11e8-ae04-0242ac110002:1-25536412", mysqlGTIDSet1.toString());
+        assertEquals("726757ad-4455-11e8-ae04-0242ac110002:1-20304074", mysqlGTIDSet1.toString());
     }
 
     @Test