diff --git a/src/entity/brizzi_history.ts b/src/entity/brizzi_history.ts
index 6350b40..770795b 100644
--- a/src/entity/brizzi_history.ts
+++ b/src/entity/brizzi_history.ts
@@ -9,6 +9,13 @@ export class BrizziHistory {
     @PrimaryGeneratedColumn('uuid')
     id: string;
 
+    @Column({
+        nullable: false,
+        length: 64,
+        unique: true
+    })
+    code: string
+
     @ManyToOne(() => BrizziCard, { onDelete: 'RESTRICT' })
     @JoinTable()
     card: BrizziCard