Issue #3153455 by Berdir, larowlan, Eduardo Morales Alberti, Gauravmahlawat,...
Issue #3153455 by Berdir, larowlan, Eduardo Morales Alberti, Gauravmahlawat, sleepingmonk, PhilippJC, alexpott, catch, daffie, jibran: UID base field override configs can still have old default value callbacks