CatalogRecord.language marked with `sh:Violation`

[joachimnielandt]

DCAT-AP/releases/3.0.1/html/shacl/shapes.ttl

Line 81 in d610a1b

sh:path dct:language ;

In the following snippet...

:CatalogRecord_Shape
    a sh:NodeShape ;
    rdfs:label "Catalog Record"@en ;
    sh:property [
        sh:path dct:language ;
        sh:severity sh:Violation
    ];
    sh:targetClass dcat:CatalogRecord .

... dct:language is marked with sh:Violation. I previously thought this had an impact on the cardinalities, but after reading a bit more on shacl it looks to me like this is an empty rule. How should this be interpreted?