Redmine

Hello All,
I am new to using redmine and I am trying to understand if I filter out how many issues whose "Target Version" has changed after initial allocation of the Target Version. Objective is to understand variance for the issues Targeted Versions and to check how many issues were completed based on initial target Version and how many issues Target Versions were changed and by how much schedule. This may be useful to evaluate planning efficiency by managers.
I could not find any plugin for this but any pointer to the existing feature/plugin will be great help.

Note: I understand that there is a log created in the issue - "Target version changed from" in case of Target Version re-assignment But i am not sure how to filter issues based on this log.

Thanking you in advance.
Best regards
Rakesh