Not all file names have been changed

Hello Florian and others,

I have a folder with 85 files where I want to change all the Interpret and Album
names. In Mp3tag this works and shows that all names have been changed.
In the windows Explorer there are 10 files where the file-tags for Interpret and
Album are emptyand have not been changed. I saved the files several times but
the 10 files won't adapt the new names.
What am I doing wrong?

Thank you,