The Inventory Utility to remove unused bins is supposed to check if a Bin is assigned as a Default Bin on the Item-Site (Item Quantities Maintenance >> Bins button). It does not perform this check, and removes bins even if they are assigned as defaults on the Item-Site. The Remove Bins Fix ensures that the Remove Bins tool does not remove bins if they are set as a default.
Navigation: Tools >> Setup >> Company >> Setup GP PowerPack
Mark the box next to TWK-INV: Remove Bins Fix, then click DONE.
The feature will be enabled for the current user. Other users must restart their Dynamics GP client to enable this feature.
Using Remove Bins Fix
Run the Remove Bins utility from Tools >> Utilities >> Inventory >> Remove Bins.