For this to occur, it requires that the page DM is started up using a pageID or a routeID that is from a different page than the one starting up the DM. At the end, this would result in changes being saved to a different page than the one you edited. So this error message protects you.
I don't see any way for this to occur naturally. If you have a data set that generates this error, you need to supply it, or this error will not be fixed. You have not replied to the reports you created about this spanning over 12 months.