diff --git a/migrations/000.265.sql b/migrations/000.265.sql
new file mode 100644
index 0000000..337927f
--- /dev/null
+++ b/migrations/000.265.sql
@@ -0,0 +1,3 @@
+-- P5-6279: add primary key to markets_locales table
+
+alter table market_locales add primary key (id);