3826947 - Why I'm getting the error "The value in this field is invalid: XXXXX Attendee Type" or "The value in this field is invalid: AtnTypeKey"in the Personal Attendee Import?

After creating the Attendee Import Template, and not modifying the attendee type's configuration, I performed a personal attendee import using the same attendee type name, but the system is showing an error related to the name: "The value in this field is invalid: XXXXX Attendee Type" or "The value in this field is invalid: AtnTypeKey"

Despite using the same attendee type name, I'm getting the error "The value in this field is invalid: XXXXX Attendee Type" or "The value in this field is invalid: AtnTypeKey" in the Personal Attendee Import , KBA , CON-CA , Cross Applications , CON-EXP-ADM-ATN , Attendees , Problem