When upgraded to 1.18.2, my armour stands have disappeared.

(This has happened to me before)
I was updating MC to 1.18.2 and I decided to play my backup world that I made when I upgraded on 1.18, but I checked my armour stands in my shop and have disappeared, both the valuable armour and the armour stand itself. Please help, my armour is very important for me and it would be a burden to try and get it back.