Structure v8.1.2 - Change History Item property reference not working

Question

I want to show the last date/time Fix Version/s was updated.  I'm trying to use Change History Item Property reference in a formula, but it's not working.  I don't get an error message.  It's just blank.  Here's one example of what I've tried that is not returning anything on an issue that has a Fix Version/s.

history.changes
.FILTER($.field = "fixVersions")
.LAST()
.changeGroup.timestamp

I confirmed that we are on Jira Software Data Center and Server 8.20.  Also, I can get the HISTORICAL_VALUE formula to work, was part of the same release.  That leads me to believe I should be able to write a formula to get the last time Fix Version/s was updated.

Ryan Campbell · Accepted Answer

Please note:  I just found out that we have a custom field in Jira that is called "History".  It does appear that Structure is automatically mapping the variable in my formula to that custom field.  Is there a way to remove that mapping and have it map to the Structure item "history"?

Ryan Campbell · Accepted Answer

I figured it out.  I changed the variable name to "History1", and then manually mapped it to the correct Structure attribute, which was the second instance of "History".  Now, it's working!