Error on updating Database while installing additional modules - Identity manager

In my opinion, the steps are in the wrong order.
The binaries of the workstation running the database update have to be updated prior to the database.

Thanks Andreas,

I'm not sure about this. Do you have a link to the steps for additional modules installation?

This is the documentation on how to update a OneIM installation: https://support.oneidentity.com/technical-documents/identity-manager/8.1.2/installation-guide/15#TOPIC-1368376

Step 2 "Update the administrative workstation on which the One Identity Manager database schema update will start."

Is done prior to 

Step 6 "Run a schema update of the One Identity Manager database."

Therefor updates of the administrative workstation are done prior to schema changes of the database.

If done in the other order, during database compilation the changed database might refer to dlls that aren't installed on your workstation yet.