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 ('6979d7d5e1c639283e4f0d4c5b8c5f53', -1, 1713398865, 1713398865, '03119cc8', -4, 0, 0)

Line : 187
File : sessions.php