Red exclamation mark on album artwork

[fc7 123]

I just noticed that some of the albums in my Music library have a red exclamation mark on the top-left corner of the artwork:

 

 

Does anyone know what's the meaning of this indication and what should I do to get rid of it?

I also noticed that the albums with this mark, are albums that I manually refreshed with the "Refresh" option in the 3_vertical_dot menu on the webclient after for example renaming a music file.

 

I'm running Emby server 3.0.7624.6 on CentOS 7.

 

Thanks

[thefirstofthe300 292]

I think that means that something went wrong with identifying and fetching metadata for that item.  Luke would know for sure though.

[Luke 43194]

it's going away so nothing to worry about