PDF preflight "font name is not unique"

[fradia]

Hi there!
I've been using google fonts not only for digital but also print usecases. I've never had any issues with it, when exporting a PDF/X-3 out i.e. of illustrator for print.
Now I have a print product which does have some visual problems with the fonts. I have not converted the fonts into vector paths as I thought, they are going to be embedded anyways.
Unfortunately now I've realised, that the PDF does contain embedded fonts BUT the "wrong" typefaces - or it is missing some. The preflight is giving an alert named: "font name is not unique".
I went through all older PDF-files that I've created the past years with google fonts in it and they ALL have this alert showing up when I do the preflight. There were never any problems with the final print product, so this is the first time it seemed to really making trouble. I am in shock as I didn't know that this can happen... I didn't know there were some fonts that are not able to be embedded properly - and that it is google fonts, that seem to have this issue. Does anyone know this problem (I couldn't really find any problems reported)? Does anyone know how to "rename" the fonts properly? Is there any preflight-fix for this?
Thanks for replies!

[JR Boulay]

This is not a critical issue but you can easily fix it using the Preflight:

[fradia]

Yeah!!! I see!!! That was exactly the fix I was searching for! Thanks!

Unfortunately I still have the very strange issue that the wrong font-type is listed as embedded: i.e. I've used "Montserrat Regular" in my file, but in the PDF there is only "Monserrat Thin" listed (which I haven't used at all in the document).
Example (in german Acrobat):

So if I use the fix you've just mentioned, this will just sort out the problem with this funny naming-alarm - but I can't really say, if the right font ist embedded. Any ideas for that?

[fradia]

I've just realized: Could that be because the font is a "various (VAR) font"? So the font is always named after the "first" one of the possible ones that are listed in the preset-styles? That might be an explanation. I then will never be sure that the PDF has the right "info" about the typeface for the printer in it, as it has simply any name. 😞

[JR Boulay]

If Acrobat and InDesign referred to fonts the same way that would be ideal, but I don't think that's very important.