diff --git a/doc/release-notes/rl-2511.section.md b/doc/release-notes/rl-2511.section.md
index 68af70fe5783..496dfd946a40 100644
--- a/doc/release-notes/rl-2511.section.md
+++ b/doc/release-notes/rl-2511.section.md
@@ -306,6 +306,9 @@
 - `jellyfin` was updated to `10.11.x`, which includes heavy backend changes.
   Make sure to backup your data and configuration directories
   and read the [Jellyfin 10.11.0 release announcement](https://jellyfin.org/posts/jellyfin-release-10.11.0/).
+  **Important:** make sure you're running Jellyfin version `10.10.7` before upgrading,
+  and beware that the migration may take several hours depending on your library size and state.
+  The process must not be interrupted.
 
 - A new hardening flag, `glibcxxassertions` was made available, corresponding to the glibc `_GLIBCXX_ASSERTIONS` option.