Dear Antonio,
Create new client and copy only configuration data.
using Client profile SAP_CUST.
Refer Note 552711 - FAQ: Client copy
Note 19574 contains information about the relationship between client-specific Customizing, cross-client Customizing and the corresponding application data.
Refer SAP Note 19574 - CC-ADMIN: Controlling data selection during client copy
Then Delete the Source Client.
Regards,
V Srinivasan