diff --git a/audiobookshelf/ReadMe.md b/audiobookshelf/ReadMe.md
index c496ebf..0d671df 100644
--- a/audiobookshelf/ReadMe.md
+++ b/audiobookshelf/ReadMe.md
@@ -1,2 +1,4 @@
 # Audiobookshelf
 Modified from official instructions: https://www.audiobookshelf.org/docs/#docker-compose-install
+
+**WARNING**: If you ever accidentally leave an old version of an Audiobookshelf database where a new version can see it, a restart may cause it to load the old database, and **its default behavior when this occurs is to delete every file it doesn't recognize**. Thankfully, I had backups, but I have to set up all of the metadata around this all over again now.