Asked HubSpot support earlier today and got directed here to upvote the idea.
The internal definition of what an MQL is could be updated, meaning that contacts that previously didn’t qualify for MQL now are qualified.
If we want to update these contacts retroactively, that would cause a spike in the data.. which we don’t want. Instead we would like to edit the became a marketing qualified lead to the date when the contact should have become a marketing qualified lead.