diff --git a/FAQ.md b/FAQ.md
index 17391397..e91cd017 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -45,6 +45,10 @@ Until then you can as a workaround for the first import try to
 2. import your account on your smartphone
 3. put your notes back to the original folder step by step and sync everytime you put some notes back 
 
+### `IllegalStateException: Duplicate key`
+
+This is issue was caused by a bug which was present in the Notes Android app between `3.4.0` and `3.4.10`. It has been fixed in `3.4.11`, though it created a corrupt database state which is not recoverable automatically without data loss. It is therefore required to [clear the storage of the Notes Android app](#tokenmismatchexception-and-all-others) and import your account again from scratch. Make sure to backup unsynchronized changes before doing this.
+
 ### `NextcloudFilesAppAccountNotFoundException`
 
 We are not yet sure what exactly causes this issue, but investigate it by [adding more debug logs to recent versions](https://github.com/stefan-niedermann/nextcloud-notes/issues/1256#issuecomment-859505153). In theory this might happen if an already imported account has been deleted in the Nextcloud app.
@@ -115,4 +119,4 @@ Further `24%` used Android 7 - Android 9 and can utilize [tweaks](https://www.an
 
 The efforts and benefits of a) maintaining a custom hacky dark mode vs. b) supporting natively the global dark mode inclusive auto-theming on low battery etc. is in absolutely no proportion anymore.
 
-The same applies to the widgets of the Nextcloud Deck App and the Nextcloud News App.
\ No newline at end of file
+The same applies to the widgets of the Nextcloud Deck App and the Nextcloud News App.