Unable to create a group with the desired email address

Unable to create a group with the desired email address

Hello!

I don't have any group for my domain yet:  http://prnt.sc/dy9mh2

But when I try to create a group with the name "All" and the address " all@paramountcbs.com" I see the following error:  http://prnt.sc/dy9myw

The same problem when I try to create a group with the name "Teamleads" and the address " teamleads@paramountcbs.com":  http://prnt.sc/dy9o82

Please, help! It is very important to create these 2 groups with exactly the same names as above.