On October 30, 2026 , Supabase applies a new default to every existing project: new tables you create in the public schema are no longer reachable through the Data API until you explicitly grant access. New projects have worked this way since May 30. This is a good change. It also creates a moment where a rushed fix can leave you worse off than before. Here is what changes, what you will see, and how to fix it without reopening your data. What actually changes Until now, ...