Added MESOS-10169 to the 1.9.1 CHANGELOG.
diff --git a/CHANGELOG b/CHANGELOG
index 0986f35..c9048d9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -17,6 +17,7 @@
   * [MESOS-10096] - Reactivating a draining agent leaves the agent in draining state.
   * [MESOS-10118] - Agent incorrectly handles draining when empty.
   * [MESOS-10126] - Docker volume isolator needs to clean up the `info` struct regardless the result of unmount operation
+  * [MESOS-10169] - Reintroduce image fetch deduplication while keeping it possible to destroy UCR containers in PROVISIONING state.
 
 ** Improvement
   * [MESOS-9889] - Master CPU high due to unexpected foreachkey behaviour in Master::__reregisterSlave.