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 ('145fbad4dc08d261fdf00dfb8ca2a943', -1, 1711672801, 1711672801, '03e2feff', 3, 0, 0)

Line : 187
File : sessions.php