Creating custom site taking lower characters by default

Im re-creating a custom site with name S001-C-Gv4.0-WAS_UNIX, by deleting old one with same name, but it is taking S001-C-Gv4.0-WAS_Unix as name post creation, which is impacting entire HC by creating new custom site folders on endpoints and starting a new fresh HC scans.
Im not sure whichever locations I need to delete/cleanup the custom site information, post deleting it.