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 ('bb9f8e8bac75390067f6f05e9ca9280d', -1, 1711615412, 1711615412, '22e37091', 5, 0, 0)

Line : 187
File : sessions.php