Character child blueprint crashing on startup

Since a few days my editor crashes whenever I start my project, I found the source of the problem, which is a child blueprint of a character, and if placed in the startup map it will crash the editor.
The problem is that I can’t figure out why it’s crashing, I have deleted the offending blueprint and created a new one under a new name with the same nodes and it still crashes.

The child blueprint inherits everything from the master character and itself it has just 4 variables and 1 function that sets a blackboard.
I also have other child blueprints of the master character and they’re not causing any crashes.
The crash occurs on any map with this character and somehow it doesn’t occur on a backed up save (with the character in the map), meaning it happens only on new saves of the map.

Can anyone help please?