3439776 - error "unable to contact primary site host Trying old-style port" when trying to re-register a secondary that was working before being unregistered

After unregistering a secondary system replication site, when you later try to re-register it you get an error

unable to contact primary site host <ip address of primary> (<hostname of primary>):4##02. internal error,location=<ip address of primary>:4##02. Trying old-style port (port offset +100)...<ip address of primary> (<hostname of primary>):4##02

SAP HANA Platform Edition

NetException; register; enable_ssl; 40002; replication;  , KBA , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) , HAN-DB , SAP HANA Database , Problem