2
dont worry at all just
if webmaster have no post in forum just create a new id and add that to webmasters
if your webmaster have a post in forum follow this:
1- find the post and find post_id
2- go to phpmyadmin and xoops_bb_posts then find uid of that post_id
3- create a new id and go to phpmyadmin and in the xoops_users table change uid with the deleted one
go to edit user and sync
also look at this:
http://xoops-tips.com/modules/news/article.php?storyid=64