SYSCONFIG: How to do a "clean" SysConfig-based project migration from AM2434_ALV to AM2434_ALX (same part, different package)

Tool/software:

Hi TI, dear fellow engineers,

My question aims at getting a better understanding of how to correctly migrate an existing SysConfig-based example project from one device package to another.

I do have Code Composer Studio Version 12.8.0.00012 installed, my SysConfig is v. 1.21.0.

I want to migrate the example project epwm_duty_cycle_sync_am243x-evm_r5fss0-0_nortos_ti-arm-clang, which is configured to be used with the general-purpose Evaluation Module AM2434-EVM.
I want the project to be used with AM2434-LP instead.
AM2434-EVM has AM2434 in the ALV package.
AM2434-LP has AM2434 in the ALX package.

So my basic assumption is this:
A migration from AM2434_ALV to AM2434_ALX should be possible without major problems, as the two devices basically have the same silicon, just in a different package. Please correct me on this, if I am wrong.

To make a long story short:
Looking at the final result I did succeed in the project migration (got the very same physical output on the Launch Pad, as I do on the EVM).

BUT: the following issues leave me with doubts on whether the way I got there is correct:

Issue #1:
After importing the project I change the device package configuration in SysConfig:

This does result in the following error message:
"Error encountered while migrating project 'epwm_duty_cycle_sync_am243x-evm_r5fss0-0_nortos_ti_arm-clang': Target 'AM2434_ALV' has no cores with the ID 'r5fss0-0' - migration operation aborted!

This error message sounds a bit strange to me, because physically AM2434_ALV for sure has an R5FSS0-0 core. But I do understand, that I need to do also reconfigure the target configuration and possibly some flags.

So I carry on by changing the target configuration from AM2434_ALV to AM2434_ALX and in addition to that under "project properties" --> "SysConfig" --> "Miscellaneous" I change two flags as follows:

After these changes and adjustments on my part, the project compiles without errors or warnings. The project can be used with AM2434-LP and delivers the desired results without any visible problems.

Issue #2:
After doing all of the above, in the "Project Properties" no change has been applied to the original device variant:

It is still the original device configuration, using AM2434_ALV, even though the package has been changed in SysConfig before.

So to sum it all up:
How would I correctly migrate that project?
Can a project be migrated like this at all, or is what I did simply not intended to be done like this?
Why does the device variant remain unchanged in the "Project Properties"?

Thank you for your support!