Konsole: remove empty profiles

Hi, I just noticed that in Konsole, under "Settings -> Manage profiles... -> Profiles", there's a whole list of unnamed profiles. I try to delete them, but for every single one of them the Remove button is greyed out.

I checked my ~/.local/share/konsole dir. The only ".profile" file there is my current default one. I searched my home dir for other .profiles, but none of those I find are linked to Konsole.

I have no idea where these profiles are coming from, how do I delete them ?

TIA.