Usage is high from Capacity of your license as showed in the screenshot which you attached, better increase the capacity of your license that would help you in that case.
or use new license which has sufficient capacity as per your requirement.
As you can see from, i've purchased the capacity, added the license to vCenter but how do i assign the new capacity to new protection group within the current SRM?
Can you check in Asset TAB >> Under Solution where you will see SRM but I don't think we have option to configure multiple license anyway give an try.
no, nothing in assets
When you click Asset
>>> Then you need to click on "Solutions" where you will see SRM Product.
>> Select that and then you can assign license with option "Assign License".
Fyi, only one license you can assigned there.