Exclude constraint is behaving mutually.

Hi,

We have customizable product ‘Root Prod’ with below two subcomponents under relationship ‘Subscriptions’.
Prod 1

Prod 2

Requirement:
When ‘Prod 1’ is selected then ‘Prod 2’ cannot be selected by user.
When ‘Prod 2’ is selected then ‘Prod 1’ can be selected by user.

Issue:
We have implemented below constraint to achieve this requirement but it is behaving as mutual exclude where On selection of Prod 2  it is also excluding Prod 1.

Constraint:
When (selection of Prod 1 from Subscriptions) excludes (selection of Prod 2 from Subscriptions)

Is there a way where exclude constraint can work in one direction only.

Tried to have the product under different relationship but still exclude is working mutually.