Hi, afther installing the POS module in could not start a new session because of this error:

Traduction: "
The operation cannot be completed:

- Create/Update: A required field is not defined.

- Delete: Another template requires the record to be deleted. If possible, archive it.

Template: Transfer (stock.picking), Field: Source Location (location_id)

where to set up the mandatory field location_id from stock.picking?