Disable filter from dimension in table

[Zaidan_as]

As i mentioned in the subject, i want disable the first dimension in my table from selecting a filter.
The table and the disabled dimension is like this

The reason I wanted to disable it because I use "Above" formula in O/B and Outstanding column. 

Is there any solution ?

[OmarBenSalem]

2 ways : 

1) The hard way : you change your above expression to not change no matter so selection : a combo of aggr and {1}

2) You create ur date field as a measure not a dimension : aggr(only(date),date) => no filter possible

[Zaidan_as]

sorry for late response,

for the first solution, 
How do I change my code, is it like this 
=Sum(InVal) to =Sum({1}aggr(InVal))

for the second solution,
the result is still the same. The table still changed