phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '84b968b5fe47cb5e65f64fea1bc7db18' 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 ('84b968b5fe47cb5e65f64fea1bc7db18', -1, 1757790810, 1757790810, 'd849d822', -4, 0, 0)

Line : 187
File : sessions.php