diff --git a/src/entity/asset_request_order.ts b/src/entity/asset_request_order.ts
index 59dfb9e..4d50aef 100644
--- a/src/entity/asset_request_order.ts
+++ b/src/entity/asset_request_order.ts
@@ -31,7 +31,7 @@ export class AssetRequestOrder {
     @JoinTable()
     supplier: AssetSupplier;
 
-    @Column({ type: 'varchar', length: 50, unique: true })
+    @Column({ type: 'varchar', length: 50, unique: true, nullable: true })
     code: string;
 
     @Column({ type: 'varchar', length: 50 })