default format don't be saved if option active is false

hello :
my slice defaut like this :
slice: {
"reportFilters": [
{
"uniqueName": "Periode.Year",
"caption": "Periode.Année"
},
{
"uniqueName": "Periode.Month",
"caption": "Periode.Mois"
},
{
"uniqueName": "Periode.Day",
"caption": "Periode.Jour"
}
],
"rows": [
{
"uniqueName": "nom_operateur",
"caption": "Opérateur"
}
],
"columns": [
{
"uniqueName": "[Measures]"
}
],
"measures": [
{
"uniqueName": "nom_operateur",
"caption": "Opérateur",
"active": false
},
{
"uniqueName": "heure",
"caption": "Heure",
"active": false
},
{
"uniqueName": "temps_pause",
"caption": "Durée totale des pauses",
"active": false
},
{
"uniqueName": "temps_pause",
"aggregation": "sum",
"caption": "Durée totale des pauses"
},
{
"uniqueName": "hors_temps_pause",
"aggregation": "sum",
"caption": "Durée totale hors pauses"
},
{
"uniqueName": "Durée totale de connexion",
"formula": "sum(\"temps_pause\") + sum(\"hors_temps_pause\")",
"caption": "Durée totale de connexion"
},
]
}
but when we export file JSON, we lose all the options "active : false"
could you help me plz ?
thank you