Address registered error cannot be registered again

Address registered error cannot be registered again

Hi, I have registered a webmaster email but unsuccessful with a customized domain name; however, since it is now stuck in the system database, I cannot add this address to the account management on the admininstrator admin account. I wonder if this can be deleted somehow or I could report it to the admin?
webmaster@litocrm.com

Thank you very much!

Ted.