We have several workstations that are having _old and _old_1 being appended to the name. They look like this:

 

workstation1.domain.net

workstation1.domain.net_old

workstation1.domain.net_old_1

 

What is causing this? None of these machines have been removed from the domain, and we perform a scan every other day. The workstations are always put in the "In Store" state, and all the correct hardware information is being populated (make, model, CPU, service tag, etc.). We're using SD+ Enterprise 8.0 Build 8012.