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 ('fcafb4f9828a6bbae60b4f9285731981', -1, 1714017538, 1714017538, '038b619d', -10, 0, 0)

Line : 187
File : sessions.php