Fontbook can't decide whether font is a duplicate or not there
I'm starting a new job as a designer and am getting their CI's font sent to me, but when I try to install the multiple versions of the font under the font family, fontbook says I already have it installed (it's a commercialised special font, there would be no way that I have it already) and the only options are to install "again" (keep both) or ignore. When I try to open it in illustrator, it's not there. I have no idea why this is happening, I tried overriding it by saying "replace" which prompted me to replace the bold version with the black version (I should have both these versions but fontbook insists they're the same thing) and I also tried the option of "keep both" when, opened in illustrator, puts a diamond next to the font and makes it unusable. If anyone has encountered this before, or knows a solution to this, please let me know.
MacBook Air 13″, macOS 13.2