BGP Duplicate AS Number

Hi there,

I could use a little help if you could provide it. So basically the day finally came where a new client tells me their AS number and it conflicts with the AS of an existing neighbor we have. Here is the config I was going to push to our Arista until I noticed the duplicate:

 neighbor 10.1.1.21 remote-as 64000 neighbor 10.1.1.21 description Client 1 neighbor 10.1.1.21 timers 5 15 neighbor 10.1.1.21 route-map client1-accept in neighbor 10.1.1.21 route-map client1-advertise out neighbor 10.1.1.21 maximum-routes 12000 neighbor 10.1.1.25 remote-as 64000 neighbor 10.1.1.25 description Client 2 neighbor 10.1.1.25 timers 5 15 neighbor 10.1.1.25 route-map client2-accept in neighbor 10.1.1.25 route-map client2-advertise out neighbor 10.1.1.25 maximum-routes 12000 

Does anyone have an idea of how I circumvent this on Arista EOS without involving them? Thank you!