Re-allocate user and group names
By default, Virtualmin will not allow you to restore a domain if the
administration login is already in use on this system, such as by another
domain with a similar name. However, changing this option to Yes
will force re-allocation of user and group names which will prevent a clash.
This can be useful if you are using example.com and want to restore
a backup of example.org from a different system.