diff --git a/src/main/java/com/loafle/overflow/model/meta/MetaDisplayItemMapping.java b/src/main/java/com/loafle/overflow/model/meta/MetaDisplayItemMapping.java
index 7ea3498..070be0a 100644
--- a/src/main/java/com/loafle/overflow/model/meta/MetaDisplayItemMapping.java
+++ b/src/main/java/com/loafle/overflow/model/meta/MetaDisplayItemMapping.java
@@ -34,7 +34,7 @@ public class MetaDisplayItemMapping {
   @Column(name = "IS_DEFAULT", nullable = false, columnDefinition = "Boolean default false")
   private Boolean isDefault;
 
-  @Column(name = "FORMULA", nullable = false)
+  @Column(name = "FORMULA", nullable = true)
   private String formula;
 
   @Temporal(TemporalType.TIMESTAMP)