Fusion AI Agent Studio 26C: HTTP 403 when updating business objects created by another user

We’re investigating an authorization issue in Oracle Fusion AI Agent Studio 26C in our non-production environment. Our developers can create and update their own custom business objects, but cannot save changes to business objects created by another developer.

We reproduced this with two users and two simple, manually created test business objects:

Test	Result
User 1 creates BO1, reopens it, and updates its description	Successful
User 2 updates BO1’s description	Authorization denied
User 2 creates BO2, reopens it, and updates its description	Successful
User 1 updates BO2’s description	Authorization denied

The objects are configured under SCM → Inventory Management, using Monolith resource