Sometimes, "fixed" means the file was re-saved to change a technical property.
: A quiet, post-production studio environment where a recording session has just concluded. The Lighting after star session lilu set 04 136 jpg fixed
While the "Lilu" in your search likely refers to a person, "Lilu" is also a well-known technical term in other fields. Understanding these can provide context for the tools you might use. Sometimes, "fixed" means the file was re-saved to