History
Codebeamer issues are versioned. Every change such as editing, commenting, or workflow transition results in a new issue version identified by a unique version number.
* 
The History tab no longer shows the change history. The tab shows the version history of the issue. Clicking a version number displays this historical version.
Only the current version (head revision) of an issue is editable depending on issue status and user permissions. Concurrent editing operations are now detected., Only the first user committing the changes succeeds. The commits of other users editing the same revision are rejected with the Attempt to update non-head revision message.
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