Getting Index IDs Back In Sync

How do I fix a “new index ID” issue in a set of devices syncing with one another?

I was getting “[file name] has a new index ID” messages between device 1 and device 2, and sync wasn’t happening. So I went to device 2 and ran syncthing with -reset-deltas. That cured the problem between those two devices, but now the device 3 is issuing “has a new index ID” messages about device 2.

Do I need to go to each machine in my network and -reset-deltas or is this an issue Syncthing will sort out on its own if I leave it alone? Or maybe I need to shut them all down and then start them one at a time with -reset-deltas?

That is just an info message, I don’t think it means you need to go and fix stuff.

New index IDs happen when devices connect the first time, or on database migrations which happen now and then, or when forced by -reset-deltas. It’s not an issue, and by definition happens only once so resolves itself automatically.