Change ONE specific subitem status to DONE when a specific column changes to DONE, or Vice-Versa

Hello.

I want to change ONE specific subitem status to DONE when a specific column changes to DONE, or Vice-Versa (when a specific subitem is marked as DONE, a specific column is marked as DONE).

The only solution I found cannot specify which subitem can be marked as done.
For exemple, here is what I want:

When status change to DONE on a specific column,
I want the status to change on ONE specific subitem to DONE.

With Autoboost, it seems I cannot selected to which subitem I want the status to change to DONE. Like it will mark all of the subitem as DONE, which is not I I want.

Is there an option?
Thank you
Fannie

How would an automation know which subitem to change?

I’m acting on the assumption that things are dynamic and subitems are being created and deleted on any number of items.

The only thing I can think of is creating a separate status column in the subitem with a specific status and then an automation that says when a status of the subitem changes to “x” then the status column changes to done.

Hi. This is actually the turn around solution I also think is best. It is the only one so far I thought of and it works.
Thanks