phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4cff23e7856422abf687f1dd2f0e84f6' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4cff23e7856422abf687f1dd2f0e84f6', -1, 1768897280, 1768897280, 'd849d8ad', 1, 0, 0)

Line : 187
File : sessions.php