Additional manga covers for republished manga

[Pika]

I've stumbled upon an extra cover of Sayuri, but the cover is for a bundled version of the same manga (two volumes in one).
So here's the catch, there's not really a volume number for a bundled version, so I just put "1+2" as volume number. But this made the complete edition go between volume 1 and 2 as if there was an extra volume between them.

Is there any way to fix this?

 

[Lymus]

Use some other number to sort them to the top or the very bottom
like 0.# or X.#

I used 0.# for the special re-release covers of Eat-Man for example.
https://mangadex.org/title/3656/eat-man/covers/

 

[Pika]

Oh ok, I'll keep that in mind for the next time!

Thank you so much!