Error deleting domain alias

[ArefM]

Hi,

I receive an error message when I want to remove a domain alias:

DomainAlias::delete() failed:
---------------------- Debug Info -------------------------------
0: C:\Program Files\SWsoft\Plesk\admin\plib\common_func.php3:153
psaerror(string 'DomainAlias::delete() failed: ', string 'domainmng::del_alias() failed: domainmng failed: Execute mailmng --remove-alias "--domain-name=iana.ir" "--alias-name=iananews.com" "--alias-type=full" failed: Can't delete domain alias.
Domain: iana.ir [iana.ir].
Reason:
The specified domain alias was not found in the specified domain.')
1: C:\Program Files\SWsoft\Plesk\admin\htdocs\domains\domain_aliases.php:54

Thank you