Problem with "Artist" tag

[christo_01]

Dear all,

Could you please have a look to the print screen here and advise on how to solve the problem with the "Artist" tag ?

I have a big MP3 library and this problem occurs with a big number of files.

Thanks a lot !
Chris

PS: All the tags in ID3v1, ID3v2 and APEv2 look similar to the one shown.