Webmin : Failed to save user, User root is already using UID 0 error

By | May 5, 2011
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Using a restricted Webmin account for module “Users and Groups” to create new user, the following error occur :

Failed to save user : User root is already using UID 0

This is because permission on User and Groups module for this user are incorrect.  The user has no right to increment the UID. To set it correctly, go to :

Control panel menu ;
Webmin Users ;
Click on the username ;
Open up Available Webmin Modules ;
Click on User and Groupe module ;
Enable the option ” Can auto-increment UID number? “.