inconsistent sort tags

[balma01]

I'm testing perfectunes.What does it mean that some files have an <inconsistent values> for a sort tag?
Fo EXAMLE it says:

album artist__________album artist sort__________inconsistent album artist sort values

Arto Lindsy__________incosistent values__________Lindsay Arto

[Spoon]

Re: inconsistent sort tags

It means not all your files have the same Artist Sort value for that Artist, clicking the recommended change item will write to all files.