2 expiring dates

I bought lucky star tin fish on the 19 February 2025 at boxer supermarket in Zeerust. On the 23rd February there was a whatsapp circulating stating that the are 2 BB dates on the tin . Upon investigating the tins I bought I saw that the is a BB on the tin written 15/10/24 on the side of the tin covered or hidden by the paper wrap and on the top of the tin it's written 28/10/2027. So can Boxer supermarket explain as to why the are 2 expiring dates because it looks like they are selling expired tin fish and hide the old expiring date with the paper wrap.