Field help (CCNCADDEV2) 

This display-only field is exploited only when the Concessions management was defined at the context level as being based on the Renewalmode.
It automatically populates after the renewal operation, when it is a renewing fixed asset: It contains the amortization expense variance amount transmitted by the fixed asset or assets to be renewed and having to be submitted to a amortization expense addition in the fiscal provisions calculation.