[{_id:ObjectId("63ea2e2e376ea74c07e96205"),sections:[{questionsIds:["mg7y0aluqkyui487","nonmatchingvaluetoremove"],_id:ObjectId("63ea566e7dc0b332cb34c4b1")}],questions:[{value:"mg7y0aluqkyui487",_id:ObjectId("63ea2e28376ea74c07e961e8"),},{value:"00fbk5o57p9le49q",_id:ObjectId("63ea2e28376ea74c07e961e9"),}],}]

db.collection.update({},{"$pull":{"sections.$[].questionsIds":{/** this needs to be questions.value*/"$nin":["mg7y0aluqkyui487"]}}},{"multi":true,"$timestamps":false,})