Quote Originally Posted by MStowastiqVahlshdeh View Post
SE removed items from the game like belts and some high quality items. If your retainer has things that are deemed "obsolete" or nolonger able to be sold via the market board but you still have them up for sale, the system will notify you that it is removing those items from the market board.

Links from Lodestone re notes about the changes:
Removal of Belts in Patch 6.0

Changes to HQ Items in Patch 6.0


"The following additions and adjustments have been made to retainers:" "You will now be notified if items placed on the market become prohibited or obsolete. "
The problem is that warning notification is appearing even when we don't have any of those items for sale.

As I said, my experience seems to be it's appearing when any HQ crafting materials are listed not just those now market prohibited.