As shown in the following screenshot, when the vendor form is opened, under the General fast tab, the mandatory fields are Vendor account and Group:
Vendor account can be assigned manually or automatically through the number sequence.
Group is a mandatory field that represents the vendor group that this particular vendor belongs to, and this is considered as the integration point between accounts payable and general ledger through the posting profile; however, the posting profile can be on the level of the vendor code. The vendor grouping is a joint effort between the procurement department and the financial department, ...