-- 提现账户改为每个渠道各登记一次，保留既有账户数据。
ALTER TABLE worker_withdrawal_accounts
  DROP CONSTRAINT IF EXISTS worker_withdrawal_accounts_pkey;

ALTER TABLE worker_withdrawal_accounts
  ADD PRIMARY KEY (worker_id, account_channel);

COMMENT ON TABLE worker_withdrawal_accounts IS '打手每个渠道仅可自行登记一次的提现账户';
