Lost the ability to change Equation values depending on configuration Lost the ability to change Equation values for different configurations

AA 2016-04-01

Hello,

Somehow I have lost the ability to use different values in
Equations for different configurations. Just the table no longer offers the opportunity.

I know that it is like this, when you haven`t make any configurations, but
I have some.

Does anyone could
help me with advice, why it happens and how to recover this opportunity?

Thanks in advance.