We reached out to HubSpot to see if you could make it mandatory for "associations" (company, contacts etc.) to be selected or created when creating a new "deal".
They informed us there was no way to configure this to make these fields mandatory upon creating a deal.
Does anyone think it would be helpful or sensible for this to be available. Surely most companies have a contact and/or company associated with most deals regardless of what stage they are in.