Change constitution of firm from proprietorship to partnership firm

I have a query regarding Auditor appointment, in a company, In an AGM an Auditor who is having proprietorship firm has been appointed, now after 31st March but before Date of signing of Balance sheet, the Auditor Dissolves its Proprietorship firm and enter into Partnership, now the query is whether the Auditors have to file fresh Form adt-1for change of name in auditors firm and new appointment should be for remaining years or for fresh 5 years ??