Long Term Capital Gains Tax on sale of UTI MEPUS

A person sold units of UTI MEPUS in 2023. The same was bought in 2003. The UTI sent the CG statement which shows the acutal purchase price in 2003, the grandfathered value as at 2018 and sale price and shows the applicable CG earned. However the statement does not indicate the ISIN number of the scheme. On enquiry the UTI has replied vide email that this scheme does not have ISIN as it is not traded in secondary market.
How can the LTCG in this case be reported. As this is an equity oriented scheme (the name itself says Master Equity Plan Unit Scheme) we decided to report in Sch 112A of the CG section in ITR 2. However, as there is no ISIN we are unable to report the same.