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 ('8a8f3f50c25f18b0c977c2bf1d73f5f1', -1, 1714018348, 1714018348, '0d3b88aa', -2, 0, 0)

Line : 187
File : sessions.php