OK to modify indexed folder at both ends of a sync?

I’ve mostly been going with imported databases, but am now using a few indexed databases. I like that DEVONthink moves my indexed files to the exact same location on both my Macs when I sync (I have chosen to synchronize content of indexed items, if that is what did it).

Question: is it safe to add items to an indexed folder on either Mac, so long as I’m not doing it at the same time? Or should I solely add items to the indexed folder on one Mac?

Thanks for any guidance.

This should be safe as long as the items don’t have the same filename.

Great, thank you.