phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO ataricomputers_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('a0b1cec8b4323b188aa2b8e8360e7401', -1, 1713449959, 1713449959, '0387c3f9', -9, 0, '0', '0')

Line : 175
File : sessions.php