Renaming Notes mail file creates duplicate user entries in Notes Migrator (4326829)

In Notes migrator, there are duplicate entries for the same users pointing to separate mail files causing the migration to fail. The mailfilepath would be found, with the following error:

13:59:00 ERROR: [8788-61-1-00004103] Unable to scan for Notes databases in 'PDCHSRT1/Servers/APD!!srtechnics\kleufen.nsf'.
13:59:00 NSFDbOpen:
13:59:00 File does not exist

The cause is due to the following process:
- Run Directory Export & Locate Notes Data stores
- Rename a user's mail file
- Re-run Directory Export And Locate Notes Data stores
- A duplicate of the existing user is created

The user's mail database does not have a template entered within the 'Inherit Design from Master Template' of the user's properties.

Please complete the following to set this:

- Select the properties of the user's mail file within Domino
- Select the fourth tab 'Design'
- Tick the 'Inherit Design from Master Template
- Enter the template name, such as 'StdR6Mail'

- Now re-run Directory Export and Locate notes Data Stores