phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2f5c96d77e65a963317daf7da33fc0d8' 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 ('2f5c96d77e65a963317daf7da33fc0d8', -1, 1766165779, 1766165779, 'd849d817', -4, 0, 0)

Line : 187
File : sessions.php