-- 019: 场景分类从「人群→场景」改为「岗位/职能」(元宝清单)，清空旧 persona 取值交由 AI/重导重新归类。
-- 幂等：仅把已知旧 id 置空，重跑无害。
UPDATE market_apps
SET capability = NULL
WHERE capability IN (
    'freelance_content','freelance_client','freelance_finance',
    'office_doc','office_data','office_email','office_pm',
    'edu_prepare','edu_grade','edu_tutor','edu_home',
    'biz_product','biz_service','biz_ops',
    'general_write','general_research','general_agent'
);