"Migrated property [author] from class [XWiki.XWikiComments]" creates recent Notifications

I'm upgraded incubator.myxwiki.org from version 8.2.1 to 10.7 and I had notifications about "edited the page" from people and pages on a wiki that is not used anymore, see details.png

If you look in the history of those pages you will get:
2018/09/26 16:02 Migrated property [author] from class [XWiki.XWikiComments]
example
https://incubator.myxwiki.org/xwiki/bin/view/Polls/Mostproductivedayoftheweek#History or
https://incubator.myxwiki.org/xwiki/bin/view/Improvements/ImprovedEdit#History

This looks like a bug since it's not reflecting the reality so maybe we could make an exception in Notifications for migrators.