Impossible to edit APN

I have a brand new fairphone 5, directly installed murena on it and I can't make my Danish sim on youSee network to function.

When compared to my fairphone 4 the APN for internet is wrong, but when I try to edit create a new APN or anything from the GUI on my fairphone 5 I'm met with the error message: duplicate APN entry.

I've attached my working APN and a picture of the error message.