I have a bit of an issue Im importing from PHPBB3 however my user table is separate from my PHPBB table as I use the user details for other aspects of my site so its custom but originates from phpbb so uses the same basis but is has a different name and some of the columns are different. I have changed the importer code to reflect this and ran a test import on a fresh install and it worked but with one issue. XF importer requires us to merge or change duplicate emails, I merged for the sake of the test import. HOWEVER I have quite a few users with the same email address. They used to be allowed couple of accounts with the same email this is because users open shops on my site and some users require more than one shop as they have a couple of business that they like to keep separate and I only allow them to have one shop per account due to the way the site is set up. I no longer allow this users that want more than one shop are required to select a new email address. However that doesn't change the fact that I have duplicate emails that I don't want to merge or change. Is there a way around this? I don't really want to email them all asking for alternative addresses as there is just over 100 users. I would rather just force the import to import them and then bulk email them after to ask them to change it. If I change the import script to force it to ignore the duplicates will I cause problems elsewhere?