diff --git a/NOTE.md b/NOTE.md
index 665c4b3c..71d3c6e7 100644
--- a/NOTE.md
+++ b/NOTE.md
@@ -38,3 +38,10 @@ fvm flutter build apk --release --no-tree-shake-icons
 
 1. nix installieren (für flake nutzung) (optional aber dann reproduzierbar)
 2. flake anwenden
+
+## Problems that occurred
+
+### Flutter Java Version Problem
+
+- unset flutter jdk-dir (`flutter config --jdk-dir=""`)
+- a specified java version in the flutter config leads to a java