Is stamp duty payable twice if flat number is corrected

Hi I had purchased a flat from a developer and got my stamp duty paid and sale deed registered in June 2015. The property is in Mumbai at Andheri. However the flat number mentioned in the sale deed was erroneously put as 1202 instead of 1702 which I noticed in April 2017. The area of flat and measurements remain same. 1. Can I get this corrected through a rectification deed or a correction deed? 2. Do I need to repay full stamp duty & registration​ charges for this correction or are there nominal charges for the same? 3. What is the procedure involved? 4. How is the developer going to be involved in this process? 5. What are the formalities and paperwork involved in this? Thanks & Regds Haren