This may be a basic Alteryx ETL question. I am trying to insert/update a basic table with 2 dimensions and one measure.

As you could see I begin with a source table like above screenshot which I am trying to load into Target. Next time I may have a new record coming for these states (e.g. OH / Week 2 / 800) or there could be an update for an existing record (e.g. OH / Week 1 / 1350) . I need to handle both of these while loading the Target. My Database is Oracle.
I tried using the option Update : Insert if New. However it failed with error 'Primary Key required for Update option'.
I am not sure if that is the right option and how I can define a primary key to handle that with such a dataset. Thank you for the help.