When new user register a message failed to create forum account occurs and for your kind information i have already deleted all my user but i am only left and my uid is no 1 and whenever 2nd user register the uid no directly goes to 29 instead of 2
If you deleted all of the users then you need to go into phpMyAdmin and go to operations, then reset the auto increment to 1 instead of 29 for the table for forum users.