[{name:"Apple",weight:"100g",color:"red",other_data:{havested_by:"Jhone",havested_from:"Rileys Farm",city:"Oak Glen, California",country:"USA"}}]

db.collection.update({other_data:{$exists:true}},[{$replaceRoot:{newRoot:{$mergeObjects:["$$ROOT","$other_data"]}}},{$unset:"other_data"}],{multi:true})