apt source list for Zimbra 9

So I was alerted by a friend about /etc/apt/sources.list.d/zimbra.list content in Ubuntu 20.04

Taking a look that's what I have there:

deb     [arch=amd64]  https://repo.zimbra.com/apt/87  focal zimbra
deb     [arch=amd64]  https://repo.zimbra.com/apt/8815  focal zimbra
deb     [arch=amd64]  https://repo.zimbra.com/apt/90  focal zimbra
deb-src [arch=amd64]  https://repo.zimbra.com/apt/87  focal zimbra

As you can see there are 3 repositories pointing to V8 versions but this is a Zextras V9... so this rise my questions:

Are those V8 repositories suppose to be there?

Should I remove it from there?