Conflict file on encrypted node

[atomicbird]

I have a share on two local Macs and one Ubuntu VPS, all running Resilio 2.6.3.

The Ubuntu host is reporting a conflict file in its web UI. But it's using an encrypted key, so while I know that the affected file is called "CMRQCTHMAJJVPK2..." [246 characters long] I have no idea what file(s) on the Macs are related to this, or what to do about it. There's an "Ignore" button but I don't know what effect that would have. The "more info..." link in the error takes me to this page, which doesn't look like it's helpful in my case: https://help.resilio.com/hc/en-us/articles/204753629-Conflict-files-in-Sync

The Macs don't report any problems, although "status" on them stays at 100% without ever quite finishing.

What can I do about this?

I'm attaching a screenshot of the error shown on the Ubunto host.

[atomicbird]

Slight update, the Macs not quite reaching 100% seems to be unrelated. I fixed that after reading this forum message, but the conflict on the Ubuntu side still exists.