diff --git a/backend/supabase/contact.sql b/backend/supabase/contact.sql
index 78cc736a..ab33b511 100644
--- a/backend/supabase/contact.sql
+++ b/backend/supabase/contact.sql
@@ -1,6 +1,6 @@
 create table if not exists
   contact (
-    id text default uuid_generate_v4 () not null,
+    id text default uuid_generate_v4 () not null primary key,
     created_time timestamp with time zone default now(),
     user_id text,
     content jsonb