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 ('bffd36d4f58e0696b42a15217a16f3d2', -1, 1714044137, 1714044137, '0d3ac51a', -8, 0, 0)

Line : 187
File : sessions.php