SAP Message AJ481 - Enter the missing energy feeding volume for &1 calorific value district

Diagnosis
When values are missing in table TE921 (energy feeding by calorificvalue district), but replacement values are allowed, table TE348(average energy feeding by calorific value district) is used. Thistable must contain the average energy feeding volume for each calorificvalue district and month.
This information is incomplete for calorific value district &v1&.