Wikidata:Database reports/Complex constraint violations/P31

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Complex constraint violations report for instance of (Discussion, uses, items, changes): that class of which this subject is a particular example and member (subject typically an individual member with a proper name label); different from P279; using this property as a qualifier is deprecated—use P2868 or P3831 instead
Data time stamp: 2018-10-16 22:11 (UTC)
The report is generated based on the settings on Property talk:P31.
Updates overwrite this page. Some may already be fixed since the last update: check RecentChangesLinked.
The report can include false positives. No need to "fix" them.

Multiple P31 claims lead to duplicate tuples[edit]

Multiple P31 claims are unnecessary in most cases with Wikimedia-related items. Consider facet of (P1269) instead of second P31 value.

no results or query error

P31=samevalue and P279=samevalue[edit]

in most cases this is an oversight or item that needs update after child item(s) were added

violations count: 1911

P31=samevalue and P279=samevalue (indirect P279)[edit]

in most cases this is an oversight or item that needs update after child item(s) were added

no results or query error

Strange P31 link between parents in P279[edit]

violations count: 143

Avoid P31 of P279 of Q5 (P106 or other properties should be created)[edit]

violations count: 277

Second claim and unspecific[edit]

is most cases unspecific could be replaced with specific variant

violations count: 1021

Can't be human and possibly fictional[edit]

keep only one claim

violations count: 274

Can't be one thing and group of things[edit]

keep only one claim, split into several items: Q1880543, Q161678, Q232009

no results or query error

Can't be ?item P31 ?item[edit]

impossible claim or it should be a separate item

no results or query error