phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'acffdd2a4f5e9ba4b9665720ecfe86f8' 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 ('acffdd2a4f5e9ba4b9665720ecfe86f8', -1, 1714219884, 1714219884, '0391c947', 0, 0, 0)

Line : 187
File : sessions.php