Michael added a comment.
The error seems to be in the JS when trying to create a new statement with that property. The `setClaim` api call already contains `"type": "unknown"`, which is incorrect. claim "{\"type\":\"statement\",\"mainsnak\":{\"snaktype\":\"value\",\"property\":\"P6835\",\"datavalue\":{\"type\":\"unknown\",\"value\":\"Codes+over+$$F_{4}+vF_4$$+F+4+++v+F+4+and+some+DNA+applications\"}},\"id\":\"Q4115189$143dd941-4398-8a1c-f4ac-c82ab03adfd9\",\"rank\":\"normal\"}" That being said, a bad API call also should not cause a server error. So we have two problems to fix here. TASK DETAIL https://phabricator.wikimedia.org/T265521 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Michael Cc: Michael, Aklapper, thcipriani, Akuckartz, darthmon_wmde, Nandana, Lahi, Gq86, GoranSMilovanovic, Maosef, QZanden, LawExplorer, Debenben, _jensen, rosalieper, Scott_WUaS, Jonas, Izno, Verdy_p, Wikidata-bugs, aude, fredw, Physikerwelt, Pkra, Lydia_Pintscher, scfc, Jdforrester-WMF, Mbch331, Rxy, Jay8g, Krenair
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