Property talk:P209

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Inverse property of [[Property:PTemplate:Str sub|Lua error in Module:Wikidata at line 19: attempt to concatenate a nil value. (PTemplate:Str sub)]]⧼colon⧽
If [item A] has [[Property:PTemplate:Str sub|Lua error in Module:Wikidata at line 19: attempt to concatenate a nil value. (PTemplate:Str sub)]] with value [item B],
then [item B] should also have [[Property:PTemplate:Str sub|Lua error in Module:Wikidata at line 19: attempt to concatenate a nil value. (PTemplate:Str sub)]] with value [item A].
Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P209#Inverse