Trying to upgrade from EV 8.0.5 to EV 9.0.5 - event 7137

We are in the middle of an upgrade.

I successfully installed the binaries on all 4 of our servers in the site.

I successfully updated the Directory database from one of the servers.

I started the Storage Service on that same server.  I received the confirmation that the VaultStore DB associated with that server was upgraded, but never got a 6221.

Instead, I received event 7137, stating:

The database for Vault Store (different vault store database) has a schema version of ‘8.38.3.14’ which is not the latest version.  Start the Storage service that hosts the Vault Store in order to upgrade the schema version.

Start the storage service on:  (other server)

Do we have to start all of the Storage services on all of the servers at the same time?