There was a need to create the CIDR data type, as announced in the update to UP9. However, after updating to UP10 (7.5.0 UpdatePackage 10 (Build 20241008193358)), the data type is not listed when creating in Reference Data Management. If you create this data type via the Admin interface - Reference Set Management, only then can you manage the information using Reference Data Management. As the application is owned by IBM Security Expert Lab Services and not IBM Product Support I would like to contact you regarding this issue.