How the dam content is pushed to your publish instances ? Did you check with your team ? Even though we can make changes via CRXDE ( given you should have permission to login ) I will say don't make any changes in the publish directly. That is not how AEM is designed to perform . If you think your AEM Dev has no Author ( which I am not sure why !?) please reach out to your team and understand from where the content is pushed to the publish. Go via the proper medium. Publish should be used only to check your final product whether image or page .