Database
[{"parserErgebnis":[{"values":{"prop1":{"status":"OK","wert":"03.00"},"prop2":{"status":"OK","wert":"1"}}},{"values":{"prop1":{"status":"OK","wert":"03.00"},"prop5":{"status":"OK","wert":"1"}}}]}]
Query
db.collection.update({},[{$set:{parserErgebnis:{$map:{input:"$parserErgebnis",in:{$mergeObjects:["$$this",{values:{$arrayToObject:{$map:{input:{$objectToArray:"$$this.values"},in:{k:"$$this.k",v:{wert:"$$this.v.wert"}}}}}}]}}}}}],{multi:true})