diff --git a/sm-core-model/src/main/java/com/salesmanager/core/model/reference/zone/Zone.java b/sm-core-model/src/main/java/com/salesmanager/core/model/reference/zone/Zone.java
index 827dead..11055c9 100644
--- a/sm-core-model/src/main/java/com/salesmanager/core/model/reference/zone/Zone.java
+++ b/sm-core-model/src/main/java/com/salesmanager/core/model/reference/zone/Zone.java
@@ -44,7 +44,7 @@ public class Zone extends SalesManagerEntity<Long, Zone>{
- @Column(name = "ZONE_CODE", unique=true, nullable = false)
+ @Column(name = "ZONE_CODE", nullable = false)
private String code;
public Zone() {
