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 ('16fc70498b8327f852480d590937d36b', -1, 1713004871, 1713004871, '23ae3ea2', -4, 0, 0)

Line : 187
File : sessions.php