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 ('7cde119b78c28d3cf060d917c35016b4', -1, 1709079229, 1709079229, '03ec9199', -11, 0, 0)

Line : 187
File : sessions.php