Hello
Read the upgrade guide as it clearly states what should be done during the SPDD and SPAU phases.
If looks like this is the first system in the landscape that you are upgrading so you can continue without entering the transport request.
Once the shadow system is up and ready for the SPDD phase the SUM tool will prompt you to perform the SPDD task on client 000 in the shadow system. There will be transport separate requests created for SPDD and SPAU tasks.
During the next system upgrade the SUM tool will automatically detect these transport requests and will ask you whether you want to use them or not.
If you want use the transport requests used for SPDD and SPAU on the first system then you can enter them in this screen while performing the next system upgrade.
Else you will have to manually perform the SPDD and SPAU tasks on each system.
Regards
RB