Last Field Value Change Date is not working for Fix Version

[Brian Spence]

I have defined the formula in a Last Field Value Change Date/Time Field as:

<!-- @@Field: fixVersions -->

however, this is never populating.  Is there something wrong in the syntax?  I've also tried using "Fix Version/s" which is how it appears in Change History, which is what you're supposed to use for custom fields.  Neither ever seems to work.

 My use case is I would like to be able to build a report that shows scope change for a specific release, or group of releases, based on the Fix Version field being updated.

[Brian Spence · Accepted solution]

Heard back from Innovalog, and the answer is to use:  <!-- @@Field: Fix Version -->

This did work.