Getting "Update cancelled by trigger (se.base.method,update.record)" when changing KMdoctype

Hello,

I'm trying to change the name of a document type but it's not saving and i'm getting Update cancelled by trigger (se.base.method,update.record) . It's only happening on the reference document type, I can rename all other document types just not the reference document type. 

I've tried logging in and out, the datapolicy and the DBdict looks alright, and I haven't made any triggers and don't see triggers that have to do with this

 Any ideas what could be causing this issue?? I've attached the full messages