Problem Adding Add-on Domain

[mpax10m2]

Hi Having this issue with adding add-on domain.

(XID d5x2cz) A DNS entry for “argel.tk” already exists. You must remove this DNS entry from all servers in the DNS cluster to proceed.

Please help. TIA

 

[bdistler]

Having this issue with adding add-on domain

at URL --> [ http://argel.tk/ ] - I 'see' a loading (working) site