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 ('6cde458c9844c2ac8a8f56dd0f06f2b6', -1, 1711726373, 1711726373, '03ece264', 5, 0, 0)

Line : 187
File : sessions.php