[Wikidata-bugs] [Maniphest] [Created] T207675: Some items are in an inconsistent state

[Floatingpurr]

Floatingpurr created this task. Floatingpurr added projects: Wikidata, Wikidata-Query-Service. Restricted Application added a subscriber: Aklapper.

TASK DESCRIPTION

I was exploring wdt:P594 when I realized that queries like the following one does not return a stable result but they vary between true and false (probably depending on the server(s) they hit):

ASK WHERE
{
  wd:Q18047295 wdt:P594 ?ensembl.
  wd:Q18047295 p:P594 ?statement .
  ?statement ps:P594 ?ensembl .
}

It's pretty weird, since that should be the standard Wikidata data pattern. Seems like it's happening again the issue described in T112397

Edit: @Gstupp fixed wd:Q18047295 with a manual editing (see here: https://github.com/SuLab/scheduled-bots/issues/22)

Other possible affected items:

SELECT * WHERE
{
  ?item wdt:P594 ?ensembl .
  FILTER NOT EXISTS {
    ?item p:P594 ?statement .
    ?statement ps:P594 ?ensembl . 
  }
}

A couple of questions:


Is it a general inconsistent state of Wikidata or is it happening just for a subset of items (e.g., those updated with bots)?
Is there a way to detect, to fix and - even better - to avoid those inconsistencies?


Thank you guys!

TASK DETAIL

https://phabricator.wikimedia.org/T207675

EMAIL PREFERENCES

https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: Floatingpurr
Cc: Aklapper, Smalyshev, Floatingpurr, Gstupp, Nandana, Lahi, Gq86, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331

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