`Phatality ID` got removed more than three years ago in rPHAT96ea0062dd8c9d19cff1bed40b77d33fc9915a11 but not in Phabricator.
[X] Find Forms exposing that field: `SELECT CONCAT("https://phabricator.wikimedia.org/maniphest/task/edit/form/",id), engineKey, builtinKey, name FROM phabricator_search.search_editengineconfiguration WHERE properties LIKE "%error.id%" AND properties NOT LIKE "%error.id\":\"hidden%";`
[X] Hide that field from Form https://phabricator.wikimedia.org/maniphest/task/edit/form/46/ via https://phabricator.wikimedia.org/transactions/editengine/maniphest.task/view/46/
[X] Hide that field from Form https://phabricator.wikimedia.org/maniphest/task/edit/form/68/ via https://phabricator.wikimedia.org/transactions/editengine/maniphest.task/view/68/
[X] Hide that field from Form https://phabricator.wikimedia.org/maniphest/task/edit/form/95/ via https://phabricator.wikimedia.org/transactions/editengine/maniphest.task/view/95/
[X] N/A: Update `"maniphest.custom-field-definitions"` by setting `"search": false` for `error.id` in https://gitlab.wikimedia.org/repos/phabricator/deployment/-/blob/wmf/stable/scap/templates/phabricator/conf/local/local.json.j2 --- not applicable because field does not even exist due to {T398460}
[X] Hide that field from the Maniphest Advanced search by setting `"search": false` for `error.id` in https://phabricator.wikimedia.org/config/edit/maniphest.custom-field-definitions/
[ ] Maybe remove all its entries from fulltext search index (got added in T244330): `SELECT * FROM phabricator_maniphest.maniphest_task_ffield WHERE fieldKey = "!Qxw";`
[ ] Maybe completely remove that field `error.id` from ~~ https://phabricator.wikimedia.org/config/edit/maniphest.custom-field-definitions/ ~~ in https://gitlab.wikimedia.org/repos/phabricator/deployment/-/blob/wmf/stable/scap/templates/phabricator/conf/local/local.json.j2 but would that break anything in existing Form definitions due to being mentioned in the `phabricator_search.search_editengineconfiguration.properties` DB?