diff --git a/database/102-up-timescale/20231214123812-user-transactions_aggregate_to_table.sql b/database/102-up-timescale/20231214123812-user-transactions_aggregate_to_table.sql
index f3eafbcf1..800b0a5db 100644
--- a/database/102-up-timescale/20231214123812-user-transactions_aggregate_to_table.sql
+++ b/database/102-up-timescale/20231214123812-user-transactions_aggregate_to_table.sql
@@ -5,7 +5,7 @@ CREATE TABLE aggregated_user_transactions (
 	token_short_name TEXT,
 	network network_blockchain,
 	time TIMESTAMP,
-	transaction_hash VARCHAR,
+	transaction_hash VARCHAR UNIQUE,
 	sender_address VARCHAR,
 	recipient_address VARCHAR,
 	amount DOUBLE PRECISION,