FORM NULL HAS BEEN REJECTED BY RO WITH REMARKS DUPLICATE

I have completed my articleship in 2016 with supplementary of 25 excess days and giving final exams since then but today I have received an email today with title of "SUPPLEMENTARY DEED REQUEST HAS BEEN APPROVED BY RO" but inside the mail text written as your form null has been rejected by regional office with remark DUPLICATE

Kindly visit icai self service portal for further details

But there is nothing on icai self portal too

Please help me to understand this email. What they want to say