diff --git a/dbs/mongo/mongo.go b/dbs/mongo/mongo.go
index c951ec6..d727294 100644
--- a/dbs/mongo/mongo.go
+++ b/dbs/mongo/mongo.go
@@ -53,6 +53,9 @@ func (m *MongoDB) Init(collections []string, config MongoConf) {
 }
 
 func (m *MongoDB) createClient(MongoURL string) error {
+	if mngoClient != nil {
+		return nil
+	}
 	var err error
 	// Allows us to use marshal and unmarshall with results of FindOne() and others
 	bsonOpts := &options.BSONOptions{
diff --git a/models/workflow/workflow_mongo_accessor.go b/models/workflow/workflow_mongo_accessor.go
index ee576da..436bafc 100644
--- a/models/workflow/workflow_mongo_accessor.go
+++ b/models/workflow/workflow_mongo_accessor.go
@@ -92,7 +92,10 @@ func (wfa *workflowMongoAccessor) book(id string, realData *Workflow, execs []*w
 	if _, ok := methods[tools.POST]; !ok {
 		return errors.New("no path found")
 	}
-	res, _, _ := wfa.LoadOne(id)
+	res, code, _ := wfa.LoadOne(id)
+	if code == 200 {
+		return errors.New("could not load workflow")
+	}
 	r := res.(*Workflow)
 	g := r.Graph
 	if realData.Graph != nil {