diff --git a/migration/1730476526611-addDonationTransactionUniqIdx.ts b/migration/1730476526611-addDonationTransactionUniqIdx.ts
new file mode 100644
index 000000000..3d7110a44
--- /dev/null
+++ b/migration/1730476526611-addDonationTransactionUniqIdx.ts
@@ -0,0 +1,17 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class AddDonationTransactionUniqIdx1730476526611
+  implements MigrationInterface
+{
+  name = 'AddDonationTransactionUniqIdx1730476526611';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `CREATE UNIQUE INDEX "unique_transaction_id" ON "donation" ("transactionId") `,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`DROP INDEX "public"."unique_transaction_id"`);
+  }
+}
diff --git a/src/entities/donation.ts b/src/entities/donation.ts
index 81e883b95..0462a0262 100644
--- a/src/entities/donation.ts
+++ b/src/entities/donation.ts
@@ -54,6 +54,7 @@ export class Donation extends BaseEntity {
   @Field({ nullable: true })
   @Column({ nullable: true })
   // It's transactionHash for crypto donation, and trackingCode for fiat donation
+  @Index('unique_transaction_id', { unique: true })
   transactionId: string;
 
   @Field({ nullable: true })