phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2f6688ca36701f7ad80f4e7a7453fee2' 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 ('2f6688ca36701f7ad80f4e7a7453fee2', -1, 1766004497, 1766004497, 'd849d8bf', -9, 0, 0)

Line : 187
File : sessions.php