There are two ways to change the camera name.
You can change the Location label in the Toolkit. This action will register a new source in CrowdStats when you start the analysis (new graphs) while preserving all data from the previous camera under the old name. Note that you will need an available slot on your license to add a new camera.
If you want to change the name in CrowdStats, you need to delete the camera, change the name in Toolkit and then register it again (start the analysis). The previous data from that camera will still be stored in CrowdStats but it will be marked a different colour.