Field help (FREMAI) 

The section setting up is used when the field "Same value" has "No" for value. It is used to specify the value set in the target section if the condition "Same value" or "Same value or empty" is not filled during the transit. Either this value is not recorded (the section remains empty or if a value exists, it will be deleted), either it is loaded with the value contained in the "Main" recording.