same email : 2 times

[pppplus]

After moving a domain name from user to admin, I have a small problem...

I have 2 times the same email !

[email protected] admin 2.9765
[email protected] [email protected] 0.1367 / unlimited

I try to delete the second one, but impossible.

And now, I do not receive any email to this address...

A solution to delete this email ?
Thanks for your help