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 ('67e6af45d6d1fdaa9db31c2ba6ac648d', -1, 1711695784, 1711695784, '2cc01074', 4, 0, 0)

Line : 187
File : sessions.php