This can be done by creating Composite items in Linnworks. One of your items will be a parent SKU (framed poster) which consists of 1 child SKU (unframed poster). When an order comes for a child item, then stock level of a parent is re-calculated.
Please see this documentation about creating composites: http://www.linnworks.com/support/inventory-management-and-stock-control/my-inventory/composites
We sell posters, both framed and unframed.
So I have created two stock items under a variation group which is working well.
The problem I have is that if an order comes in for a framed poster, we simply frame the unframed stock item.
So both products need to share the same stock level.
If I sell one, then it needs to be deducted from the stock level of both.
Any ideas how I can do this in linnworks please?