Technician removed from AD and re-imported no longer recieves notifications

Technician removed from AD and re-imported no longer recieves notifications

We have setup service desk plus and had all of our technicians setup and all was well. One day we had to delete one of the technicians from active directory and then recreate them with a new user and email guid. We then re-imported the users to service desk plus which includes the newly created technician account. now that technician  doesn't receive any notifications,.all the other technicians do receive email notifications except the one that was re-created. I have tried removing the technician from the technicians list making them a requester, then deleting the account and then re-adding it again manually but still no luck. Is there anything i can run against the database to remove ALL records of that account and then re-add the account again. We use a sql2008 database as the back end.

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