How To Fix TR_AUSL521 - Entry can be transported but is not usually delivered:

SAP Error Message - Details

• Message type: E = Error

• Message class: TR_AUSL - Software Delivery Composer Messages

• Message number: 521

• Message text: Entry can be transported but is not usually delivered:

What causes this issue?

The object entry indicates an object that is transportable in principle,
but usually has no significance for delivery.
Example of this are:
Transporting no-existant function modules (using 'LIMU FUNC')
<ZH>Note</>: Consistent delivery of these entries is only guaranteed by
delivering the entire function group (using 'R3TR FUGR').
Transporting software components (using 'R3TR VERS ...')
<ZH>Note</>: Delivering the complete object 'software component' is not
allowed. Instead, changes to the software component are performed by the
import tools themselves (when importing a delivery for this software
component).
Comment lines and control lines for transports (such as 'CORR MERG
...').

System Response

The system displays the affected objects in the results overview of the
object list check.

How to fix this error?

Check whether the specified objects are delivery-relevant and remove the
objects that you do not want to deliver. To do this, select them and
choose <LS>Correct Selected Entries</>.

Error message extract from SAP system. Copyright SAP SE.