diff --git a/database/entities/m_maintenance_group_entity.go b/database/entities/m_maintenance_group_entity.go
index 0e7894a..5b59282 100644
--- a/database/entities/m_maintenance_group_entity.go
+++ b/database/entities/m_maintenance_group_entity.go
@@ -4,7 +4,7 @@ import "github.com/google/uuid"
 
 type M_MaintenanceGroup struct {
 	ID          uuid.UUID `gorm:"type:uuid;primary_key;default:uuid_generate_v4()" json:"id"`
-	Code        string    `gorm:"type:varchar(50);uniqueIndex;not null" json:"code"`
+	Code        string    `gorm:"type:varchar(50);not null" json:"code"`
 	Name        string    `gorm:"type:varchar(100);not null" json:"name"`
 	Description string    `gorm:"type:text" json:"description"`
 	// ClientID    uuid.UUID `gorm:"type:uuid;not null;index;constraint:OnDelete:CASCADE,OnUpdate:CASCADE;" json:"client_id"`