Yup! Same, I'm the maintainer of the main LMDB Rust wrapper [1] and I was maintaining heed and heed3 (because 1.0 was available from the mdb.master3 branch).

But now that it's LMDB 1.0, I need to find a better way to make it be the official one but I can't really rename heed3 into heed and heed into heed-0.9...

[1]: https://github.com/meilisearch/heed