DROP INDEX IF EXISTS idx_workers_enrollment_token; DROP INDEX IF EXISTS idx_workers_install_state; ALTER TABLE workers DROP COLUMN IF EXISTS enrollment_token_expires_at, DROP COLUMN IF EXISTS enrollment_token_hash, DROP COLUMN IF EXISTS last_error, DROP COLUMN IF EXISTS last_seen_at, DROP COLUMN IF EXISTS install_state, DROP COLUMN IF EXISTS ssh_host_fingerprint, DROP COLUMN IF EXISTS ssh_private_key_encrypted, DROP COLUMN IF EXISTS ssh_public_key, DROP COLUMN IF EXISTS ssh_user, DROP COLUMN IF EXISTS ssh_port, DROP COLUMN IF EXISTS ssh_host; DROP TYPE IF EXISTS worker_install_state;