Crash when harvesting for Blueprints?

Hello, i have this issue that keeps happening. Here is the process:

Import rhino files with datasmith. Set up the file, then select all the objects and convert to blueprint. I choose “Harvest” and this tend to convert the rhino objects into a blueprint, so i can then mess around with configurations and stuff.

This always works fine until i save, i get an error that tells me i cant save the level the blueprint is in. if i remove the blueprint i can save fine, if i put it in a different level, the same issue happens.

Any ideas?