DO $$
BEGIN
    IF EXISTS (
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = current_schema()
          AND table_name = 'social_account'
          AND column_name = 'cookies'
    ) THEN
        IF EXISTS (SELECT 1 FROM social_account WHERE credential_reference_id IS NULL OR cookies <> '') THEN
            RAISE EXCEPTION 'legacy migration 13 contains account credentials; migrate them to the credential provider before upgrade';
        END IF;
        ALTER TABLE social_account DROP COLUMN cookies;
    END IF;

    IF EXISTS (SELECT 1 FROM social_account WHERE credential_reference_id IS NULL) THEN
        RAISE EXCEPTION 'social accounts without credential references block migration 14';
    END IF;

    ALTER TABLE social_account ALTER COLUMN credential_reference_id SET NOT NULL;
END $$;