Drag&Drop and/or pasting not allowed for the selected object

What causes this issue?

You wanted to include objects in the InfoNet using Drag&Drop or by
pasting the clipboard. However, the selected objects cannot be included
together.
The following selections of MetaStars or MetaDimensions are possible:
One MetaStar with its selected MetaDimensions
Several MetaStars with their selected dimensions
One MetaDimension or several MetaDimensions assigned to a common
MetaStar
The following selections of MetaStars or MetaDimensions are <ZH>not</>
allowed:
Several MetaDimensions from different MetaStars
One MetaStar and several MetaDimensions that do not belong to this
MetaStar

System Response

If the selection is not allowed, processing is canceled.

How to fix this error?

Make a valid selection and then repeat processing.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.