Field group data locked by user &1. Version types cannot be maintained.

What causes this issue?

User &v1& locks the assignment of the fields or field packages to the
field groups. This data is used for the maintenance of the version
types. When this is locked the version types cannot be maintained.

System Response

The system activates the display mode.

How to fix this error?

You have two options:
Maintain the version types later.
Contact user &v1& directly. It may be possible for this user to end
their work.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.