Writing scripts without contract key uniqueness

I’m building an app which will be deployed to a Canton based ledger.
One of my assumptions is that keys will not be unique in this app.

Is there a way to configure the sandbox to use the Canton semantics and not enforce uniqueness of contract keys?

Both Sandbox (-classic) and Daml Studio always enforce uniqueness at this point so unfortunately the answer is no. Your only option for testing non-unique semantics is Canton itself.

Thanks, I opened a feature request at Feature request: non-UCK mode in Daml studio · Issue #9549 · digital-asset/daml · GitHub