SUMMARY
The issue described in this document has been classified as a defect by Strategy. The issue can occur in Strategy Object Manager 2021 when connecting to a project source or in Strategy Developer 2021 when trying to edit a user. A solution/code fix is not available in current release, but is being reviewed for a future Strategy release.
SYMPTOM
When connecting to a project source in Object Manager, the following error may occur:

This 'Configuration' object cannot be locked because one or more of its constituents have conflicting locks placed on them.

User object '...' with ID '...' cannot be modified because it is locked by '' on '...' since ... Please contact your administrator for more information.