Deleting Imported Object Data using Object Editor

[BloodySkullz]

Hi all, I had long ago imported some Object Data into a new map using the Object Editor and the crash issues have been very annoying whenever I delete the imported data (like custom spells or units) using the Object Editor is there a way to fix this?

I tried to export my new map's Object Data to a blank map and delete from there and it crashes again omg