CRCPC2154E
The maximum of {1,choice,1#one attempt|2#{1} attempts} to check in mutable item version members for a new baseline has been reached.

Explanation

The API is trying to create a baseline from a configuration version hierarchy at {0} that contains mutable item versions. However, after it has checked in those item versions, the hierarchy appears to have new mutable item versions. The API has retried the operation, but reached the maximum number of retries configured.
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