After several years of absense I did came back and startet game as merchant so
can make chest back what was stolen.

First boot my chest skeleton stored in old castle Ok

This Last boot did turn that skeleton chest to nameless object.

So what would one do?

Help Asking Hubo

The old player castles are no longer reliable, so probably
it is vital that you find someplace to live in a
player-city. If you are low on money after your absence, several
players will rent you some room per month, and some of
these rentals also include guards. However there is much
arguing about who among these landlords is reliable, so
I will leave that to you..perhaps you have old friends that
you trust who now are among the landlords?