Export Activity with API: fixPlanning key is duplicated in json

When using API to get the activity, the fixPlanning key is duplicated, thus the json cannot be exploited in Excel Power Query.
Exemple of returned json for /api/index.php?uri=activity/1 :{"identifier":"id", "items":[{"id":"1", "reference":"-DEV-1", "name":"Rédaction spécification", "idActivityType":"19", "nameActivityType":"Development", "idProject":"1", "nameProject":"Projet Rémy 1", "externalReference":"", "creationDate":"2022-08-09", "lastUpdateDateTime":"2022-08-09 18:18:49", "idUser":"3", "nameUser":"Rémy", "idContact":"", "nameContact":"", "originType":"", "originId":"", "refName":"Rédaction spécification", "description":"", "idActivity":"", "nameActivity":"", "idStatus":"1", "nameStatus":"recorded", "idResource":"", "nameResource":"", "idMilestone":"", "nameMilestone":"", "[color=#e74c3c]fixPlanning[/color]":"0", "paused":"0", "handled":"0", "handledDate":"", "done":"0", "doneDate":"", "idle":"0", "idleDate":"", "cancelled":"0", "result":"", "validatedStartDate":"", "plannedStartDate":"2022-08-09", "realStartDate":"", "initialStartDate":"", "validatedEndDate":"", "plannedEndDate":"2022-08-22", "realEndDate":"", "initialEndDate":"", "validatedDuration":"", "plannedDuration":"10", "realDuration":"", "initialDuration":"", "validatedWork":"10.00000", "assignedWork":"10.00000", "realWork":"0.00000", "leftWork":"10.00000", "plannedWork":"10.00000", "validatedCost":"", "assignedCost":"", "realCost":"", "leftCost":"", "plannedCost":"", "progress":"0", "expectedProgress":"0", "wbs":"1.2", "priority":"500", "idActivityPlanningMode":"1", "nameActivityPlanningMode":"as soon as possible", "color":"", "minimumThreshold":"0.0000", "indivisibility":"0", "[color=#e74c3c]fixPlanning[/color]":"0", "paused":"0", "workElementCount":"0", "workElementEstimatedWork":"", "workElementRealWork":"", "workElementLeftWork":"", "workOnRealTime":"0", "idProduct":"", "nameProduct":"", "idComponent":"", "nameComponent":"", "idTargetProductVersion":"", "nameTargetProductVersion":"", "idTargetComponentVersion":"", "nameTargetComponentVersion":"", "targetValue":"0", "actualValue":"0", "pctRate":"0", "refName":"Rédaction spécification"}] }