The name "whatever name" is being used as an alias name.

Hello,

When I try to import a Planning application, I get an error message, "An object with the name Eng - SS Project Mgr - Engineer already exists".

Okay, I can find the member with that name, and I see it has an alias with the same name.  So I understand the issue.

When I try to remove the alias, or change the alias, in the Planning Dimension editor, I get an error, "The name "Eng - SS Project Mgr - Engineer" is being used as an alias name".  I can change other aliases, so what is wrong with this one?  Where is it being used, and maybe I can remove it?  I do not want to change the member name.