Could not insert new anti bot question registration information

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fd7b2b707c0381994a80d8af89358936' for key 'PRIMARY'

INSERT INTO phpbb_anti_bot_quest_regconfirm (confirm_id, session_id, start_time) VALUES ('d2fb35785b8b06707576f03209bff1e0', 'fd7b2b707c0381994a80d8af89358936', 1790504790)

Line : 124
File : usercp_register.php