Table-independent artefacts
tracker_mogaka.intern[].intern: No valid index found for table 'intern' because of the following:-
id:Unusable index: These are the offending columns and their errors:'surname: Error. Attribute intern.surname's data is missing'

tracker_mogaka.contribution["contributor"].contribution: No valid index found for table 'contribution' because of the following:-
id:Cannot add or update a child row: a foreign key constraint fails (`tracker_mogaka`.`contribution`, CONSTRAINT `contribution_ibfk_1` FOREIGN KEY (`intern`) REFERENCES `intern` (`intern`))