diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/id/IdGeneratorHolder.java b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/id/IdGeneratorHolder.java
index 5d8d3efc..9899bbd5 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/flow/id/IdGeneratorHolder.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/flow/id/IdGeneratorHolder.java
@@ -51,9 +51,4 @@ public class IdGeneratorHolder {
     public void setRequestIdGenerator(RequestIdGenerator requestIdGenerator) {
         this.requestIdGenerator = requestIdGenerator;
     }
-
-    public void clear(){
-        INSTANCE = null;
-    }
-
 }