DocumentDB update based on select statement fails

Question

I am planning to update the document, if similar values already exists in other records of the document.

Say, if root document has few records in which few fields(track,time) are similar, then I want to update the isOriginal field for such record as false.

function updateArticlesDetailsX() {

   var collection = getContext().getCollection();
   var collectionLink = collection.getSelfLink();
   var response = getContext().getResponse();
   var docCount = 0;
   var counter = 0;

   tryQueryAndUpdate();

   function tryQueryAndUpdate(continuation) {


        var query = {
            query: "select * from root r ORDER BY r.created.epoch DESC"
        };

        var requestOptions = {
            continuation: continuation
        };

        var isAccepted =
            collection
            .queryDocuments(collectionLink,
                            query,
                            requestOptions,
                            function queryCallback(err, documents, responseOptions) {
                                     //response.setBody(responseOptions);

                                     if (err) throw err;
                                     if (documents.length > 0) {
                                         document.upd
                                        // If at least one document is found, update it.
                                        docCount = documents.length;
                                        //response.setBody("Found " + docCount + " documents");
                                        for (var i=0; i<docCount; i++){
                                            tryUpdate(documents[i]);
                                        }
                                        //response.setBody("Updated " + docCount + " documents");
                                      }
                                      if (responseOptions.continuation) {
                                          // Else if the query came back empty, but with a continuation token;
                                          // repeat the query w/ the token.
                                        tryQueryAndUpdate(responseOptions.continuation);
                                      }
                                      //else {
                                        //     throw new Error("Document not found.");
                                          //   }
                            });

        if (!isAccepted) {
            //throw new Error("The stored procedure timed out");
        }
    }

    function tryUpdate(document) {
        //Optimistic concurrency control via HTTP ETag.
        var requestOptions = { etag: document._etag };

        //Update statement goes here:
        document.update({"track":{document.track},"Time":{document.Time} }, {"$set":{"isOriginal":"false!"}});
        document.created = {
      date: "2016-06-22 19:18:14",
      epoch: 1466623094582
    }
//response.setBody(document);

        var isAccepted = collection
                         .replaceDocument(document._self,
                                          document,
                                          requestOptions,
                                          function replaceCallback(err, updatedDocument, responseOptions) {
                                                   if (err) throw err;
                                                   counter++;
                                                   response.setBody("Updated " + counter + " documents");
                                                // response.setBody(updatedDocument);
                                           });

        // If we hit execution bounds - throw an exception.
        if (!isAccepted) {
            //throw new Error("The stored procedure timed out");
        }
    }
}