Maps a group the IdP asserts to a role on a team: at each login, the IdP reconcile gives everyone in the group that role. The ceiling is maintainer. Onto temper-system or the gating team, only watcher is accepted, with or without confirm_elevated (a higher role there is a system admin's native act, and the reconcile clamps any such row to watcher). Elsewhere an owner role, or an owner, maintainer or member role onto a team with the gating team or an auto-join team (live or deleted) beneath it, needs confirm_elevated: true (a watcher mapping never does); without it the request is refused, naming why, and nothing is written. Recorded as saml_group_mapping_changed. The same mapping again records nothing and answers created: false. Requires a system admin.