DROP TABLE IF EXISTS user_chat_provider_keys;

DO $$
BEGIN
    IF to_regclass('chat_providers') IS NULL THEN
        RETURN;
    END IF;

    ALTER TABLE chat_providers DROP CONSTRAINT IF EXISTS valid_credential_policy;

    ALTER TABLE chat_providers
        DROP COLUMN IF EXISTS central_api_key_enabled,
        DROP COLUMN IF EXISTS allow_user_api_key,
        DROP COLUMN IF EXISTS allow_central_api_key_fallback;
END $$;