Sync Nav picklist to CRM

Hi all,

I am using the connector to sync items between NAV and CRM. When Synching the Nav Items to CRM products I have a custom picklist (Manufacturer Code) that I have created  in NAV that I am synching with an option set in CRM. All was working fine until we started adding new values in the picklist in NAV. Now when some items are being synched, I get the following error: Name: IOGEAR not found in Picklist: Manufacturer Code on entity: product.

How do I synch my picklist in NAV to match my option set in CRM so that I don't have to add each value manually every time we add a new value in Nav?

Thank you