I have created a flow that copies the fixversion from a child to its parent (being that an epic or another task).
It works as a charm, but I have one problem: If I have parent P1 with children C1 and C2, if I edit C1, the automation copies C1 fixversion(s) to P1, but when I edit C2, it deletes all the values already in P1 and copies C2 ones... is there a way to prevent the deletion?
This is what I have tried so far:

Thanks in advance