Migrating piston from HPM Webcore to built-in Webcore is broke

[nh.schottfam]

I would suggest you backup the pistons you want to a local file, and then restore from the local file to your new instance.

I expect you are running into:

webCoRE built-in on Hubitat - Do I need to transition and how?

As many have heard announcement, Hubitat is building webCoRE into their image. I will use this wiki to update folks on integration status and options they have. Current update: January 3, 2023 What does this mean? For new installs, installing from the built in version is much easier. (If installing a new instance this is recommended) you select HE Console -> apps -> "Add Built-in App" and scroll down to webCoRE the app will automatically update as Hubibat releases new image…

and

webCore -- Account/Location Identifiers?

If you have multiple instances (same or multiple hubs) of webCoRE installed, the IDE design works best if all the instances of webCoRE are using the same 'account'. New instance installs with the latest webCoRE by default we use the hash of the Hubitat account id. So if your hubs are all registered with Hubitat under the same account, they will naturally get the same account id. So for existing webCoRE installs: Yes eventually it would be good for them to convert to the hub account hash.…

(and why we suggested to wait...)