FAQ: If I Delete a Scenario do I Lose My Discovery/Foundation Information?
Discovery and Foundation information will always flow into each scenario, so if you delete a bunch of scenarios that Discovery and Foundation data still exists and will flow into any new scenarios you create.
The platform will require that you maintain at least 1 scenario however.
If you want to clean up that one scenario we recommend cascading down a clear override on each column to clear out any old overrides.