@DaveIT 

Use the Site MIgration wizard to move a site from your old controller to your new controller.  It's the most dependable way to change platforms or cross versions and it retains all of your custom site config.  The only thing that's 'new' is the controller instance itself, ie it's name, how it's cloud connected, possibly it's IP address.

Hello @DaveIT,

We released a new pre-released firmware version of OC200 several days ago, you may upgrade the OC200 to v5.13.24 first and do the migration. The below post is for your reference: Omada SDN Controller_V5.13 Beta (Updated on Nov 23rd, 2023)

In our community, you will find some helpful labels when searching for specific topics. Allow me to introduce them:

Early Access: all early access firmware releases here, provide you with pre-release software that allows you to experience the new features and updates of TP-Link products before its official release.

Solution: This label provides a list of all currently available solutions to product line-related issues.

Official Release: As the name implies, this label lists all official firmware versions that have been released, including both current and historical releases.