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 ('861fcaa99535f3ee56f11df8d5778c7d', -1, 1713511137, 1713511137, '038e234b', -11, 0, 0)

Line : 187
File : sessions.php