42501
what this Postgres error means
How it shows up
new row violates row-level security policy for table "<table>"
What it means
SQLSTATE 42501 is insufficient_privilege: the current database role is not allowed to do what the query asked on this table.
The usual cause in an AI-built app
Supabase tables created by AI tools usually have row level security turned on, but the generated SQL often has no policy that allows insert or update for signed-in users, so every write from the app is refused.
Check this first
In the Supabase dashboard, open the policies for the table named in the error and check that one of them allows this action (insert, update or delete) for the role your request uses.
Read our fix Official reference