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 ('c51d7c6d6e4c3b0d721a1ddc8255bf7d', -1, 1714035065, 1714035065, '038dcabb', -4, 0, 0)

Line : 187
File : sessions.php