diff --git a/Releases/V0.9/release_notes.md b/Releases/V0.9/release_notes.md
index 5dbf655..58c007e 100644
--- a/Releases/V0.9/release_notes.md
+++ b/Releases/V0.9/release_notes.md
@@ -9,6 +9,7 @@
 
 ### API changes ###
 
+* [525536](https://bugs.eclipse.org/bugs/show_bug.cgi?id=525536) - [[REQU-50]](https://openmdm.atlassian.net/browse/REQU-50) - Modelling of relations 
 * [526880](https://bugs.eclipse.org/bugs/show_bug.cgi?id=526880) -  [[REQU-65]](https://openmdm.atlassian.net/browse/REQU-65) Separation of interfaces
 * [526882](https://bugs.eclipse.org/bugs/show_bug.cgi?id=526882) -  [[REQU-78]](https://openmdm.atlassian.net/browse/REQU-78) Packaging
 * [522277](https://bugs.eclipse.org/bugs/show_bug.cgi?id=522277) -  [[REQU-80]](https://openmdm.atlassian.net/browse/REQU-80) Referencing