Change images on the site from the admin panel using the plugin

Greetings Replaced the names of the images on the site from Russian to English (Latin), when you open the site, and you look in the admin panel (network section), those images that you renamed with error 404 are constantly loaded. In general, the site is not broken. Images are displayed, but in addition, old names are loaded with an error from this I suspect the server is loaded. People what to do help!