That’s a bug in the constraints on Wikidata – “date of birth” has a constraint stating that its value must be at least 30 years away from the “date of birth” value. We’ll work on resolving this (I contacted Ivan Krestinin, who added this “experimental constraint”, to ask if he still needs it – and if it can’t be removed from the P569 talk page for some reason, we’ll probably filter it out in the user script).
On 28.04.2017 00:13, Stas Malyshev wrote:
Hi!
In the past few months, the development team has mentored a student, Olga, to help us developing a user script https://www.wikidata.org/wiki/User:Jonas_Kress_%28WMDE%29/check_constraints.js that displays the constraints on the item pages.
This is awesome. Thanks so much for developing it!
Now, is there a place to submit bug reports? :) I have noticed this one: https://www.wikidata.org/wiki/Q5066005#P569 shows 2 violations, though the date appears to be completely fine.