Remove-unknown - running as wrong user

I have just migrated urbackup from a windows install to ubuntu

I used rsync as suggested and then moved the urbackup settings folder to /var/urbackup

Clients are connecting and backing up. However, I read that I should run the following

urbackupsrv remove-unknown

When I do that I get a the following

ERROR : Running as wrong user. Specified user “urbackup” with uid 112 but running as uid 1000

What do i need to do to fix this? Do I need to change the ownership of the file store and the urbackup settings folder to user - urbackup?