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 ('67293bddf873ec7973b3e888ab00d6b7', -1, 1722037966, 1722037966, '0395ff0a', 20, 0, 0)

Line : 172
File : /home/rebkell/public_html/boards/includes/sessions.php