phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f4ff1170318e9b7a4244ff96dbdaa9c4' 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 ('f4ff1170318e9b7a4244ff96dbdaa9c4', -1, 1791685230, 1791685230, 'd849d829', -4, 0, 0)

Line : 187
File : sessions.php