Unable to add the Machine to the Inventory after deleting

I have added the VM machine in the Xencenter and the machine was deleted from the inventory of the Xencenter.When I tried to reconnect the machine in the Inventory,it was unable to join in the same server.

The verification of the machine is being present in the server is identified by the command :"xe vm-list".

Since the VM machine is present in the storage of the Xenserver.

When I try to reconnect that it was not possible to do for me.So please inform the process to do that in the xencenter.