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 ('f8da7f781c9d0bad47d40eaa97de6d94', -1, 1713871964, 1713871964, '038fa8ac', -7, 0, 0)

Line : 172
File : sessions.php