User account

user warning: Duplicate entry '500888' for key 'PRIMARY' query: INSERT into captcha_sessions (uid, sid, ip_address, timestamp, form_id, solution, status, attempts) VALUES (0, '7b2d74e52471516ce66c8491d0f3892f', '54.211.157.103', 1411474634, 'user_register', '9163214928fd09b251da15e7c444b2fe', 0, 0) in /usr/local/4admin/apache/vhosts/benchrestbulletin.net/httpdocs/drupal/modules/captcha/captcha.inc on line 99.
Account information
Spaces are allowed; punctuation is not allowed except for periods, hyphens, and underscores.
A valid e-mail address. All e-mails from the system will be sent to this address. The e-mail address is not made public and will only be used if you wish to receive a new password or wish to receive certain news or notifications by e-mail.
Please re-type your e-mail address to confirm it is accurate.
Extra Details
Name will not be visible to users, just to verify registration
CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
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