diff --git a/backend/src/api/donations.ts b/backend/src/api/donations.ts
index 7d7b81b0d..c3ab24f33 100644
--- a/backend/src/api/donations.ts
+++ b/backend/src/api/donations.ts
@@ -105,7 +105,7 @@ class Donations {
   private async $addDonationToDatabase(btcPaid: number, handle: string, orderId: string, imageUrl: string): Promise<void> {
     try {
       const connection = await DB.pool.getConnection();
-      const query = `INSERT INTO donations(added, amount, handle, order_id, imageUrl) VALUES (NOW(), ?, ?, ?, ?)`;
+      const query = `INSERT IGNORE INTO donations(added, amount, handle, order_id, imageUrl) VALUES (NOW(), ?, ?, ?, ?)`;
       const params: (string | number)[] = [
         btcPaid,
         handle,
diff --git a/mariadb-structure.sql b/mariadb-structure.sql
index 770f8029a..b7eed37c4 100644
--- a/mariadb-structure.sql
+++ b/mariadb-structure.sql
@@ -100,3 +100,5 @@ ALTER TABLE `donations`
 
 ALTER TABLE `donations`
   MODIFY `id` int(11) NOT NULL AUTO_INCREMENT;
+
+ALTER TABLE `donations` ADD UNIQUE(`order_id`);