"Prevent duplicates by only adding this comment once to a particular issue" not preventing duplicate

[Dylan Alperin]

I have an automation like the below where I only want it to trigger once when first assigned.

• When: Issue Assigned
  • Rule is run when issue is assigned to a user.
• If: Matches
  • Issue type equals (Internal issue type)
    • Then: Add comment to the issue
    • "Please blah blah blah"
    • Prevent duplicates is turned "ON"

Why is it duplicating when I reassign?

[Andy Heinzer · Accepted solution]

Anytime you create/modify a new custom field in JIRA, it has to reindex to be able to see that field and use it properly.  The fact that you encountered some error while indexing is probably the key here.

I would recommend trying to reindex again.   You can try the background reindex first.   But if this problem persists after that, you might have to use the "Lock JIRA and rebuild index" option.  Please note that this will leave the entire JIRA instance unavailable to all users until this index has been rebuilt.  If you have a large environment with a lot of issues and a lot of custom fields, this process could take a long time to finish.   This lock and rebuild option should be able to fix this if you happen to have corrupted indexes for some reason.