Stranded Inventory "Inventory error" Never happened before for same PAN ASIN's


We have 100 PAN units in Stranded Inventory

We have sent all these units to DE several times before with no issues. Is this happening to other sellers?

Reason [Inventory error]

Under the reason it says “If the unit quantity is small, this error means that inventory is either under review or located in a fulfilment centre that does not deliver directly to customers. If the unit quantity is larger or the units are located in multiple fulfilment centres, check that your listing is not missing any required attributes.”