POST to `/objecten` with existing UUID raises 500 error

[stevenbal]

Product versie / Product version

3.5.0 / latest

Omschrijf het probleem / Describe the bug

When attempting to do a POST to /objecten with a UUID that is already used by another object, a 500 error is raised

IntegrityError at /api/v2/objects
duplicate key value violates unique constraint "core_object_uuid_key"
DETAIL:  Key (uuid)=(289f65bc-e1c0-43f4-b2c4-e71181315f45) already exists.

Stappen om te reproduceren / Steps to reproduce

1. Do a POST to /objecten to create an Object
2. Do a second POST to /objecten and reuse the UUID from step 1
3. Observe the internal server error

Verwacht gedrag / Expected behavior

In any case, Objects API should raise a 400 error a duplicate UUID is used.

I'm wondering though if it's intentional (or desirable) to let users specify UUIDs, this might have been an oversight?