"Has improper value for" is a predefined property to track input errors for irregular value annotations that was likely caused by type or allowed value restrictions.
en:Name of user who first entered (typed or imported) the data. This is the operator (or typist) name, which may be different from the person responsible.<br />''DefaultValue: user_name() '' +
Name of user who first entered (typed or imported) the data. This is the operator (or typist) name, which may be different from the person responsible.<br />''DefaultValue: user_name() '' +