Opening a specific Blueprint Class causes crash!

Hello. I have a blueprint class that is derived from Character called GotCharacterBase. I also have another blueprint class wich is derives from first GotCharacterBase, called C_Isaac.

When I try to open C_Isaac the editor crashes. But if I open GotCharacterBase THEN open C_Isaac everything works normally. It’s very very weird.

As a consequence of this, when I try to open any map that contains this character the editor also crashes, unless I first open the parent blueprint. What can I do about this?

EDIT:
Even if I right click C_Isaac the Editor will crash. But if I right click GotCharacterBase first the editor freezes for a few moments (loading some sort of reference I suppose) and then I can do whatever I want with C_Isaac.