Release Not triggering in PR

Hi,

We are in a Roll Out project wherein we are sharing the same client & landscape.

Now the issue is as follows.

1) The parent company has a release strategy wherein they have defined document type, Account assignment, USRC1, Total Value of PR & tracking number as the characteristics.

2) Now the company which I have been assigned to work on requires only PR document type, USRC1 & Total Value of PR as the characteristics.

3) As per my knowledge we can use only a single class for a client.

Thus kindly suggest what can I do wherein the release is triggered even if I keep some characteristics as empty i.e. account assignment & tracking number.

Thanks