Merchant Tab cant be changed

timne: last 5-10 min and NOW

A buyer bought many 1x1 items from my (only) merchant tab.

I took the chaos orbs out and wanted to put new items in.

But all my 1x1 items in inventar are "greyed out" and I can't put these in sales tab.
And I can't ,ove items inside this tab, I can take them out only.

I had traveled to towns and came back, but that doesn't change anything.

EDIT:

Relogging char helped.