In wikipedia page foo has item in wikidata When we move page foo to foo2
if items have conflict in wikidata. wikidataClient leave items without error so page is moved in wikipedia but it's items didn't update or changed.
this problem makes leave langlinks in redirect page!

Solution:
In my opinion we should add an alarm which popup and tells to user that the langlink didn't move.

example:
en:foo (item:Q123) > en:foo2 (it had item Q456)
after moving en:foo to en:foo2 because of second item wikidataClient can not move langlink from Q123 to Q456 so it leave the langlink in en:foo (item:Q123)!

Version: unspecified
Severity: minor
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=53220