diff --git a/servers/boe-server-all/src/main/java/com/xboe/module/course/entity/Tip.java b/servers/boe-server-all/src/main/java/com/xboe/module/course/entity/Tip.java
index 2f664561..3b598a4f 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/module/course/entity/Tip.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/module/course/entity/Tip.java
@@ -5,10 +5,7 @@ import com.xboe.core.SysConstant;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 
-import javax.persistence.Entity;
-import javax.persistence.Column;
-import javax.persistence.Id;
-import javax.persistence.Table;
+import javax.persistence.*;
 import java.time.LocalDateTime;
 
 /**
@@ -21,6 +18,7 @@ import java.time.LocalDateTime;
 @Table(name = "tip")
 public class Tip {
     @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     @Column(name = "id", length = 20)
     private Long id;