From the FCOM:
This warning inhibits the EMER ELEC CONFIG warning. The FCOM Volume 3 provides the ENG DUAL FAILURE steps that appear on the ECAM. However, to facilitate handling of all the ECAM procedures linked to the dual engine failure situation :
– It is recommended that the flight crew use the ENG DUAL FAILURE QRH paper
procedure
– If time permits, it is also recommended that the flight crew clear the ECAM warnings
– This QRH procedure includes the ditching and forced landing procedures.
So the EMER ELEC CONFIG warning is inhibited.