Specify that downgrade from 3.7 to 3.6 is not possible out of the box

Change-Id: I0c7fac0a9f1bfddcf05fa3764395c66c95410be6
diff --git a/pages/site/releases/3.7.md b/pages/site/releases/3.7.md
index 93844e0..208e6fb 100644
--- a/pages/site/releases/3.7.md
+++ b/pages/site/releases/3.7.md
@@ -174,27 +174,12 @@
 
 ### Downgrade
 
-Downgrade to Gerrit v3.6.x release is possible, but requires the following manual steps:
+Downgrade to Gerrit v3.6.x release is not possible out of the box because of
+[Change 334325](https://gerrit-review.googlesource.com/334325).
 
-1. Shutdown a migrated Gerrit v3.7.x server
-2. Downgrade the All-Projects.git version (refname: `refs/meta/version`) to `184`:
-   ``` sh
-   git update-ref refs/meta/version $(echo -n 184|git hash-object -w --stdin)
-   ```
-   See [git hash-object](https://git-scm.com/docs/git-hash-object) and
-   [git update-ref](https://git-scm.com/docs/git-update-ref).
+Extra care should be taken when upgrading from Gerrit 3.6 in order to minimize
+chances of having to downgrade.
 
-   > NOTE: The migration of the __label config to copy-condition__ performed in v3.7.x init
-   > step is idempotent and can be run many times. Also v3.6.x supports the copy-condition and
-   > therefore the migration does not need to be downgraded.
-
-3. Run Gerrit v3.6.x init, downgrading all plugins, and run the off-line reindex
-
-   ```sh
-     java -jar gerrit-3.6.x.war init -d site_path
-     java -jar gerrit-3.6.x.war reindex -d site_path
-   ```
-4. Start Gerrit v3.6.x server
 
 ### Native packaging