phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'c7df1675078eca46073bb1e62ecd6c78' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('c7df1675078eca46073bb1e62ecd6c78', -1, 1769884096, 1769884096, 'd849d82b', -9, 0)

Line : 180
File : /www/includes/sessions.php