Last modified: 2013-02-19 11:52:06 UTC
in wikidata in some cases removing or editing item's(Also known as) is not possible i.e: https://www.wikidata.org/wiki/Wikidata:Administrators%27_noticeboard#removing_Also_known_as
This is reproducible in production but not in a testing set up (with neither master nor remotes/origin/mw1.21-wmf10). The data in wb_terms looks ok as well.
*** This bug has been marked as a duplicate of bug 45013 ***