Cocould not change executable permissions on the application

Cocould not change executable permissions on the application. This error occurs because the certificate is used twice. That is to say, a project with this certificate already exists on the real machine. If you delete the previous project from the real machine, this project can be used. This problem occurs when you use push. Because push needs to apply for a push certificate, the certificate can only exist in one project (real machine) at the same time ). The so-called one mountains cannot be two tigers .. Apple completes the push based on this certificate ..