phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO cantautore_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('b9f60ca1c43e3c03c78c720a097a4e25', -1, 1714098560, 1714098560, '038bee4c', 0, 0, '0', '0')

Line : 175
File : sessions.php