diff --git a/docs/guides/1.18.0-upgrade-guide.md b/docs/guides/1.18.0-upgrade-guide.md
index 0d932a5d58..4d9ec054d6 100644
--- a/docs/guides/1.18.0-upgrade-guide.md
+++ b/docs/guides/1.18.0-upgrade-guide.md
@@ -4,6 +4,8 @@ page_title: "Upgrade Guide 1.18.0"
 
 # MongoDB Atlas Provider 1.18.0: Upgrade and Information Guide
 
+***WARNING:*** For users using the `mongodbatlas_advanced_cluster` resource or data sources, and defining multi sharded clusters, this new version impacts the possibility of editing the definition of these clusters from the Atlas UI. This impact is limited to the first weeks of August 2024.
+
 The Terraform MongoDB Atlas Provider version 1.18.0 has a number of new and exciting features.
 
 **New Resources, Data Sources, and Features:**