It appears that we've re-used UUIDs in several places in our sample data. This is confusing and should be fixed.
- Each record has a unique ID/UUIDs aren't reused
- the 15fb695a-cdf1-11e8-a8d5-f2801f1b9fd1 (and possibly others) are used for both purchaseOrder and poLine records. It also appears to be used as a vendorId and accessProvider.