Confluence - administrator locked out

Just to specify the queries you'd need to run in order to change the administrator password:

select u.id, u.user_name, u.active from cwd_user u
join cwd_membership m on u.id=m.child_user_id join cwd_group g on m.parent_id=g.id join cwd_directory d on d.id=g.directory_id
where g.group_name = 'confluence-administrators' and d.directory_name='Confluence Internal Directory';

With this query, You'll get the admin IDs. Then you can change the admin password with the next query:

update cwd_user set credential =
'x61Ey612Kl2gpFL56FT9weDnpSo4AV8j8+qx2AuTHdRyY036xxzTTrw10Wq3+4qQyB+XURPWx1ONxp3Y3pB37A=='
where id=<id from Stage 1>;

Hope that helps!

Rodrigo