Good day to you,

image says it all:

I used to see the message that tells me "KDE detected that one or more internal sound devices were removed.Do you want KDE to permanently forget about these devices?"

and I disabled that message, which was a mistake because I would've removed these already. Is there anyway to delete these manually?

I tried to remove the file: .kde/share/config/phonondevicesrc
but it didn't solve it, somehow there seems to be another file involved.

Thank you in advance.