How to buy capital gain bonds on zerodha

Hello
Need inputs on capital gain bonds holdiing

I purchased capital gain bonds under provision of Sec 54 EC to save tax from property sale. The bonds are allotted to DMAT account linked with Zerodha.

Now I can see the quantity on console. but it shows discrepancy . which is understandable as purchase is not done via Zerodha , so they may not have details

Unfortunately if i try fix the discrepancy manually , console returns me error “Required information to perform this action is not available”

Any suggestions how to fix it? I raised the ticket on helpdesk and now we are in loop. Resolution says I will be able to fix discrepancy only after capital gain tax saving bonds are available for trading.

Now my query is
when Capital gain bonds are eligible for trading (if at all… my earlier impression was it was locked investment) so that I can enter details in console about the investment I have done.