phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '402316e0b35de2d05ad061d7c5e4bccd' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('402316e0b35de2d05ad061d7c5e4bccd', -1, 1770976571, 1770976571, 'd849d809', -4, 0, 0)

Line : 187
File : sessions.php