Update Constituent ID is a lookup, not a free-text gift field

For a campaign, open Online Giving → Campaigns → select the campaign → Manage Donations → Online Gifts, then click the Donation ID. Older campaign menus label this Manage Gifts → Donations. For school-wide gift management, use Online Giving → Manage Gifts → Donations. For school-wide gift editing, use Superadmin, Fundraising Superadmin, Gift Management Admin, or Finance Admin. Advanced Campaign Admin can edit ordinary gifts on assigned campaigns through the campaign’s Manage Donations → Online Gifts (or legacy Manage Gifts → Donations) page. That role alone does not expose the school-wide Manage Gifts menu, refunds, or recurring-subscription changes. Advanced Form Admin can view assigned form gifts but cannot edit them solely through that role.

The donation screen's Update Constituent ID action explicitly attempts to set the ID from the gift's payer email. It is not an input for typing an arbitrary ID into that gift. If the school has no appropriate mapping, review the authorized Constituent Identifiers workflow to add/correct the email-to-ID mapping, then recheck the gift. A missing mapping and a wrong donor email require different corrections. Do not change a donor email merely to force another constituent's match.