Duplicate entry 'x' for key 'PRIMARY'

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Date: Mon, 26 Oct 2015 23:23:56 +0000
 Error: 1062 - Duplicate entry '81' for key 'PRIMARY'
 IP Address: 128.xxxx0 - /index.php?app=core&module=global&section=register
 ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 mySQL query error: INSERT INTO profile_portal (`pp_member_id`,`pp_setting_count_friends`,`pp_setting_count_comments`,`pp_setting_count_visitors`,`pp_customization`,`pp_last_visitors`,`pp_about_me`,`signature`,`fb_photo`,`fb_photo_thumb`,`pconversation_filters`) VALUES(81,1,1,1,'a:0:{}','','','','','','')
 .--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------.
 | File                                                                       | Function                                                                      | Line No.          |
 |----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------|
 | admin/sources/base/ipsMember.php                                           | [db_main_mysql].insert                                                        | 685               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | admin/applications/core/modules_public/global/register.php                 | [IPSMember].create                                                            | 1942              |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | admin/applications/core/modules_public/global/register.php                 | [public_core_global_register].registerProcessForm                             | 65                |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'
 | admin/sources/base/ipsController.php                                       | [public_core_global_register].doExecute                                       | 306               |
 '----------------------------------------------------------------------------+-------------------------------------------------------------------------------+-------------------'