Uptime error after upgrading from kibana 6 to 7

Hi.

I have setup a server that is pinging a few other servers to see if they're up or not, and then sending that data into kibana. It was working fine when I was on kibana 6. I'ver recently updated to kibana 7 and I get the following error

Error: Cannot read property 'check_group' of undefined

The ping is still happening and I'm getting results back. But the above error is appearing in the monitor status of the page.

To answer my own question, the solution here was to also update the version of heartbeat that I was using to match the version that I'm now using in kibana

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Glad it worked out!