Lydia_Pintscher created this task.
Lydia_Pintscher added a project: Wikidata.
Restricted Application added a subscriber: Aklapper.

TASK DESCRIPTION
  **Problem:**
  Wikibase handles some tasks around sitelink maintenance automatically like 
changing the sitelink when an article is moved or removing the sitelink when an 
article is deleted. This fails in some specific cases and leaves behind a 
sitelink pointing to a non-existing article. We should fix this and remove the 
sitelinks in these cases.
  
  To reproduce:
  
  1. have an Item with a sitelink to an article on a client wiki
  2. move the article with the "suppress redirect" option to a namespace that 
is not supported for sitelinks (e.g. User: and Draft: for Wikidata)
  3. see sitelink not being changed/removed
  
  **Links to existing discussions/reports:**
  
  - 
https://www.wikidata.org/wiki/Wikidata:Request_a_query/Archive/2018/10#Identifying_interwiki_links_that_no_longer_exist
  - T201371 <https://phabricator.wikimedia.org/T201371>
  - https://www.wikidata.org/wiki/Topic:Vsnby0dfotcfi23y
  
  **Acceptance criteria:**
  
  [ ] The sitelink is removed from the Item if the article is moved to an 
unsupported namespace with the "suppress redirect" option
  
  **Open questions:**
  
  - Are we doing the right thing when "suppress redirect" is not used when 
moving to an unsupported namespace? What is the right thing to do?

TASK DETAIL
  https://phabricator.wikimedia.org/T261275

EMAIL PREFERENCES
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To: Lydia_Pintscher
Cc: Aklapper, Lydia_Pintscher, Akuckartz, darthmon_wmde, Nandana, Lahi, Gq86, 
GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, 
Wikidata-bugs, aude, Mbch331
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