External Reference Spam converting projects to 4.10

Converting a project from 4.8.3 to 4.10.4 causes external reference spam in the message log>map check window.

Seems directly related to [Link Removed]. Making new jira on request.

1. Create a project in 4.8.3 (third person blueprint)
2. Open 4.10.4 Editor
3. Convert project from 4.8.3 to 4.10.4
4. Open Window>Developer Tools>Message Log> Map Check

Results:

Numerous warnings of externally referenced content.

Expected:

No external reference errors.