From 331d00b329eab222941fa7b7c4a90970046b18a2 Mon Sep 17 00:00:00 2001
From: Mateusz Kwasniewski <kwasniewski.mateusz@gmail.com>
Date: Mon, 13 Oct 2025 15:53:11 +0200
Subject: [PATCH] feat: make milestone progressions for source milestone unique
 (#10789)

---
 ...51013131405-milestone-progression-uniqueness.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 src/migrations/20251013131405-milestone-progression-uniqueness.js

diff --git a/src/migrations/20251013131405-milestone-progression-uniqueness.js b/src/migrations/20251013131405-milestone-progression-uniqueness.js
new file mode 100644
index 0000000000..0779dcead2
--- /dev/null
+++ b/src/migrations/20251013131405-milestone-progression-uniqueness.js
@@ -0,0 +1,14 @@
+exports.up = function(db, cb) {
+    db.runSql(
+        `DROP INDEX IF EXISTS milestone_progressions_source_milestone_idx;
+         CREATE UNIQUE INDEX milestone_progressions_source_milestone_idx ON milestone_progressions(source_milestone);`,
+        cb,
+    );
+};
+
+exports.down = function(db, cb) {
+    db.runSql(
+        `DROP INDEX IF EXISTS milestone_progressions_source_milestone_idx;`,
+        cb,
+    );
+};