LastActivated property is updated when synchronising

Steps to reproduce

1.  Create three pages A,B,C in author
2. Publish them in order waiting one minute among publications
3. Remove them manually from the public instance
4. Synchronize with the synchronisation app setting workspace = website, absolute path = / , fromDate = publication date of page B

Expected results

As a result of synchronization, B and C are transferred to the synchronised instance as expected.

Actual results

Everything already published in author is synchronised

Development notes

This is happening because mgnl:lastActivated property is updated when the first synchronization occurs which leads to synchronising everything again in step 4 as the fromDate is earlier than all the mgnl:lastActivated properties of the already synchronised content.