Merging two properties into one

What I’m trying to do

Merge two properties into one.
I have a property called “Type” and then property called “type:” (because I sued to write it in Frontmatter). I want to merge them into one property

Things I have tried

In the All properties window I have renamed the property called “type:” to match the other one and they just remained as two single properties with the same name. Not sure if this is the behaviour it should have.

This could be a little “refresh” issue indeed. Perhaps it suffices to close that “All properties” window and then reopen it? Or, in the worst case, close and reopen Obsidian?