Asset class &: Unit of measure missing for LVA w/ collective management

What causes this issue?

Asset class &V1& is set up for low value assets which are quantitively
managed. The unit of quantity is only maintained at asset class level.
There is no quantity unit entered for the asset class.

System Response

Without the unit of quantity it is impossible to create a master record
for collective management.

How to fix this error?

You have the following options:
Enter the unit of quantity in asset class &V1&. Go to asset class
maintenance to do this.
Change the maintenance level of screen layout &v2& for asset class &V1&
and define it so that maintenance is allowed at asset main number
level.

Error message extract from SAP system. Copyright SAP SE.