Is there a bulk way to remove a subsidiary relationship from a vendor record? Ideally, via CSV. Doesn't seem to be possible but hopefully I'm wrong

don't think so without scripting. we do bulk adding via scripting, but haven't had to look into removals.

I see a "Vendor-Subsidiary Relationship" record type import in my demo account. Can't say I've done this before, but have you tried that?

Try with Vendor sub relashion ship import and maybe check in advanced option : overwrite sublist Then update your vendor and check if it’s good if not The most simply is a mass delete

Thank you all!