Getting Error when Running Multiple Cost Scenarios in Parallel for Cost Rollup

Summary:

Getting a data-lock error when submitting multiple Cost Scenarios simultaneously for Supply Chain Cost Rollup, even though each scenario uses a different start date.

Content (please ensure you mask any confidential information):

We are running Supply Chain Cost Rollup by submitting multiple Cost Scenarios in parallel — each covering all items, but with different start dates — to reduce overall processing time.

When these scenarios are submitted concurrently, we receive the following error:

"The process BUILDROLLUP can't be started now because another process is using the data."

What is the best practice for running multiple Cost Scenarios in parallel without triggering this data-lock/concurrency error?