Update the length of the MimeType attribute to 250 chars.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types
https://stackoverflow.com/questions/643690/maximum-mimetype-length-when-storing-type-in-db#:~:text=According%20to%20RFC%204288%20%22Media,can%20be%20max%20127%20characters.