Is the database intact on one of the Mac, i.e., checked via File > Verify & Repair Database?
I’m having issues with sync and CloudKit.
The first question you need to ask yourself is, “Do I need a remote sync option?”. Consider these questions…
- Do you have a colleague, assistant, significant other, etc. that needs frequent updates to synced data?
- Are you using a shallow sync, i.e., Download Files: On demand in DEVONthink To Go?
If the answer is no to either question, a local sync on your network is suggested.
There is a forum post discussing the options and considerations of the available sync methods: Sync Types Explained
If you do need a remote option, CloudKit has not been very reliable for many people (including developers) for several months. You may want to consider an alternative.