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 ('de3a2469b3ea0a3005aa4e2190309fca', -1, 1713968563, 1713968563, '038ac842', 2, 0, 0)

Line : 187
File : sessions.php