---
title: "Why do I get a 'You cannot perform this action. Diff generation is already in progress' error when I try to deploy my app from development to production?"
url: https://docs.catalyst.zoho.com/en/faq/general/diff-generation-in-progress/
description: "In Catalyst, this issue will occur if you initiate the Development to Production deployment of a project while one of your other project's migration status is …"
last_updated: 2026-11-13T05:00:22Z
service: All Services
type: faq
---

In Catalyst, this issue will occur if you initiate the Development to Production deployment of a project while one of your other project's migration status is already in progress or hasn't been completed yet. You can try deploying your application again after all the other project migrations are completed.