Maybe @siva-reddy might know why this happens
I also found that the primary issuance date for the Britannia NCD is 7th June 2021. I found this data from NSE and the NSDL website (linked to the archived version of those pages).
Primary Issuance Data for 07-Jun-2021
| ISIN | Security Description | Issue Size (Rs in Cr) | Issue Price | Issue/ Allotment Date | Interest Payment Frequency | First Interest Payment Date | Maturity Date | Put Option Description | Call Option Description | Credit Rating Agency | Credit Rating | Date of Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| INE216A08027 | BRITANNIA INDUSTRIES LIMITED 5.5 NCD 03JU24 FVRS29 | 699 | 29 | 03/06/21 | Once a Year | 03/06/22 | 03/06/24 | CRISIL Limited ICRA Limited |
AAA AAA |
25/05/21 17/05/21 |