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 ('3345b266f5c2c99c5e500f1e2f03da0d', -1, 1709228730, 1709228730, '03ef4c19', -4, 0, 0)

Line : 187
File : sessions.php