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.