Variant Warehouses Not Saving

-- HikaShop version -- : 6.1.0
-- Joomla version -- : 4.4.14
-- PHP version -- : 8.2.29
-- Browser(s) name and version -- : Firefox 143.0.4

Greetings,

Having a problem with warehouses not saving on variants.

If I go to edit a product variant warehouse....
- when i begin to type I'm given the appropriate selection of warehouses
- i select a warehouse
- I hit the variant save button (i;ve also tried the product save button)
- i get the rotating "it's working" graphic for a second or two
- when done, the variant warehouse is reset to "None", not saving the warehouse I selected

I'm editing in the backend as a Super User with "I think" all access levels set properly in both Hikashop and Hikamarket.

Any ideas ?

thanks

Dave