What are all the Impacts in Inactivating Business Unit?

Summary:

Hi Team,

We would like to inactivate few Business Units which are already associated in some positions. Could you please confirm like inactivating business units will impact/affect any other area that we are using?

Also, please confirm once we inactivated the Business Unit, will any other business unit gets replaced in the existing position.

Below are the detailed description and screenshot for your reference. Can someone please advice on this?

Detailed description:

We would like to inactivate few Business Units which are already associated in some positions.

Navigator -> Setup and Maintenance -> Organization -> Manage Business Unit