In some cases, a platform cannot be deleted with the following message when you perform the deleting operation of the platform from [Platform Detail] in [Platform Management] menu of cloud management portal, even though there are no services shown in [Services].
An error occurred during delettion of the item. Resource has already been registered.(<Service ID>)
Figure 6.1 Error on Deleting Platform

Cause
Information of the service that has failed to add may remain, which was not deleted nornally due to a network error or other reasons.
Corrective Action
Refer to "5.2.5 Platform Operation Commands" and delete the platform by the command.