diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 2e54724220b..65604c2e6c4 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -47,6 +47,9 @@ Jetty 9.4.14.v20181114
 Upgrade Notes
 ----------------------
 
+* Due to the introduction of LIR redesign since Solr 7.3 (SOLR-11702) and the removing of old LIR implementation in Solr 8.
+  Rolling updates are not possible unless all nodes must be on Solr 7.3 or higher. If not updates can be lost.
+
 * Solr nodes can now listen and serve HTTP/2 requests. Most of internal requests (sent by UpdateShardHandler, HttpShardHandler)
   Http2SolrClient is used. Since by default, internal requests are sent by using HTTP/2,
   Solr 8.0 nodes can't talk to old nodes (7.x). However we can follow these steps to do rolling updates: