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 ('a1e6f1975d472c99d0a7739b4dc59316', -1, 1711719653, 1711719653, '035c54fd', -4, 0, 0)

Line : 187
File : sessions.php