Upgrade from an old version of CRM to 2021 R2 Patch 2

Lots of stuff didn't upgrade properly.  All errors were resolved when we did the multi-step upgrades but it definitely did not go smoothly.

We have CRM running. We can look at a customer and we can see the new Sage web screens embedded within the tabs (like the Customer tab). Using the web screen we can update the Sage customer.

When we use the CRM screen to update the customer address CRM goes away to think and never comes back.

We log out of CRM.

Then we run a query against the CRM database: select * from Person and we are blocked by the update we just tried to run. CRM is trying to update the timestamp fields on a record in the Person table.

CRM address record was updated.

Sage was not.

If I update a CRM address for a company that is not connected to Sage I have no problems - the record is updated in the CRM database with no problems.

So I feel like the mechanism by which CRM is trying to push the update to Sage is failing.  Is that using the sdata feeds?  We have done the various tests and have confirmed that sdata says 'Hello World'.

Not sure where to go to next.