diff --git a/database/migrations/0036-unique_previous_in_transactions.ts b/database/migrations/0036-unique_previous_in_transactions.ts
new file mode 100644
index 000000000..f05b044bb
--- /dev/null
+++ b/database/migrations/0036-unique_previous_in_transactions.ts
@@ -0,0 +1,13 @@
+/* MIGRATION TO SET previous COLUMN UNIQUE in TRANSACTION table
+ */
+
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+export async function upgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn('ALTER TABLE `transactions` ADD UNIQUE(`previous`);')
+}
+
+export async function downgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
+  await queryFn('ALTER TABLE  `transactions` DROP INDEX `previous`;')
+}