diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 6fd6077b3a..bcdb628062 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -79,6 +79,7 @@ Changelog
  * Maintenance: Optimise embed finder lookups (Jake Howard)
  * Maintenance: Improve performance of initial admin loading by moving sprite hashing out of module import time (Jake Howard)
  * Maintenance: Remove workaround and inline scripts for activating workflow actions (Sage Abdullah)
+ * Maintenance: Prevent `'BlockWidget' object has no attribute '_block_json'` from masking errors during StreamField serialization (Matt Westcott)
 
 
 6.1.3 (11.07.2024)
diff --git a/docs/releases/6.2.md b/docs/releases/6.2.md
index 791137f115..c0a92ab387 100644
--- a/docs/releases/6.2.md
+++ b/docs/releases/6.2.md
@@ -112,6 +112,7 @@ StreamField definitions within migrations are now represented in a more compact
  * Optimise embed finder lookups (Jake Howard)
  * Improve performance of initial admin loading by moving sprite hashing out of module import time (Jake Howard)
  * Remove workaround and inline scripts for activating workflow actions (Sage Abdullah)
+ * Prevent `'BlockWidget' object has no attribute '_block_json'` from masking errors during StreamField serialization (Matt Westcott)
 
 
 ## Upgrade considerations - changes affecting all projects