I've just started writing a guide on how to edit/update existing sheet on Roll20, that will bring up things to consider in different situations, as well as have a checklist to go through before submitting an update, to have a better chance on avoid many of the things that occurred here. Andreas Guide to Improving Existing Sheets will be split up in the following sections: How Roll20 handles PRs Expanded Submission Checklist Change Considerations p.1: Sheet Author/Maintainers Change Considerations p.2: The Existing Users Change Considerations p.3: Programming I'll update this post with a link when it's done, and will create a new thread for discussing it when I have the first version down. The intention is that it should 1) through the extended checklist provide a short version to avoid most common fumbles 2) be comprehensive enough to cover most cases & considerations when updating a sheet from the different perspectives, and give concrete suggestions on what to do & how to contact sheet maintainers.