Add return

cmd/web/handlers.go

@@ -192,6 +192,7 @@ func (app *application) CreateVotes(w http.ResponseWriter, r *http.Request, id i
 		_, err := app.votes.Insert(voterIdentity, election.ID, c.ChoiceText, c.Tokens)
 		if err != nil {
 			app.serverError(w, r, err)
+			return
 		}
 	}