I upgraded ArcGIS Enterprise from 10.7.1 to 11.3. Every upgrade (Portal, Server, web adaptors, Data Store) reported success on the upgrade. When I validate the relational data store, it fails with the error message:

When I run describedatastore, it says the data store is 11.3.0.51575.
Checking the log files, I see


If I connect to the relational data store, it says that the database is version 10.7.1. I tried to connect with ArcGIS Pro, but it fails to connect with error: Database Connection: FDO error: -2147216086. So it appears that the Data Store upgraded to 11.3, but the underlying relational data store is still at 10.7.1. How can I get that database upgraded or get it to validate properly?