ID 458608 - To Editorial: Publish email, AAF/XML and Contact Sheet will mark panels previously duplicated in editorial as 'new'

Problem summary
Panels duplicated in Editorial, sent back to Flix, then again present in a following publish, will be considered new in the publish email and the Contact Sheet. As of Flix 7.0.0, also the clips in the XML/AAF have online media, which is incorrect.

Customer reported version
Flix 6.3.4

Customer reported platform
10.14

Steps to reproduce
Note: These steps assume you have a working connection with an SMTP server for Flix email notifications.
1) Create a Sequence with 1 panel and publish to editorial
2) In Avid/Premiere, duplicate that panel
3) Send this Sequence back to Flix for reconform
4) Add a panel to the Sequence Revision and publish the three panel Sequence to Editorial again, making sure to have the Generate Contact Sheet tickbox checked

Expected behaviour
One new clip to be counted in the publish email, marked in the Contact Sheet, and online in the AAF/XML.

Actual behaviour
Two panels are considered new in the publish email, Contact Sheet, and AAF/XML. The panel that was duplicated, and the panel that was actually added in after.

Reproduced by support

This bug has been reproduced in:

7.0.0
6.3.4 - macOS 10.14 Client - CentOS 7 Server