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 ('f5052bae8e5e78b6f82e2e0b1ec55dd1', -1, 1714044668, 1714044668, '12dc89a4', 2, 0, 0)

Line : 187
File : sessions.php