diff --git a/drizzle/0039_add_ucl_bracket_simulator_type.sql b/drizzle/0039_add_ucl_bracket_simulator_type.sql
index f07c06b..08d463f 100644
--- a/drizzle/0039_add_ucl_bracket_simulator_type.sql
+++ b/drizzle/0039_add_ucl_bracket_simulator_type.sql
@@ -1 +1,9 @@
-ALTER TYPE "public"."simulator_type" ADD VALUE 'ucl_bracket';
+DO $$ BEGIN
+  IF NOT EXISTS (
+    SELECT 1 FROM pg_enum
+    WHERE enumlabel = 'ucl_bracket'
+      AND enumtypid = (SELECT oid FROM pg_type WHERE typname = 'simulator_type')
+  ) THEN
+    ALTER TYPE "public"."simulator_type" ADD VALUE 'ucl_bracket';
+  END IF;
+END $$;