Help with combining editions

[Donald]

Hello! New author here, and could use a hand :)

I just added two editions of my book:
- Print edition (https://www.goodreads.com/book/show/2...)
- Kindle edition (https://www.goodreads.com/book/show/2...)

and would like to have them combined, but don't think I have the authority to do so. Help, please :)

Donald

[Scott]

Combined

[Donald]

Thanks so much!