I’ve been getting a ton of those (20-50 at a time) on world gen post-10582 and getting them periodically throughout gameplay, but they’ve never caused a crash for me on 10581-10590.
There are a few issues on GitHub about them and one that has the same message but may not be related so I assume people are aware of it.
Someone said they’ve seen it in the context of zeds reviving, and Magiclysm players have reported it when summoned items like the bow or magelight disappear.