How do you Amend the Rule Expressions for a condition.

Hello

We are on 12.2.7 ; and have a question on the Rule Expressions that you create as a part of the conditions you define for Classification Rule Set.

We have criteria that have about 50+ lines and then we can create Rule Expression based on this. The problem is that when we add a new condition there is no way in amending the Rule Expressions as the check box against each expression is greyed out.

So we have to delete all the expression lines and start creating again. I think we are doing this wrong. We are using the "Plan Administrator" Responsibility.