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 ('124798e5c94e4b58caf4a7c3d0291bf0', -1, 1711688077, 1711688077, '03e3e5c2', 2, 0, 0)

Line : 187
File : sessions.php