phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2f4196c80eb9b3da5b5d4de0a7f79b5f', -1, 1714062649, 1714062649, '12bcafb6', -4, 0, 0)

Line : 187
File : sessions.php