Smart Narrative not recognizing measure

Hello,

I am using Smart Narrative for the text summary, in that I am trying to put numbers that are getting calculated in measures.

But when putting it in value, some of the measures are getting recognized by Smart Narrative but some are not.

Like in the above picture "TO_Contribution_business_group" is not been recognized by Smart Narrative although it is one of the measures.

What is the reason behind that?