diff --git a/releasenotes/notes/remove-allow_tenant_isolation-option-03f0d998eb498d44.yaml b/releasenotes/notes/remove-allow_tenant_isolation-option-03f0d998eb498d44.yaml
new file mode 100644
index 0000000..4f4516b
--- /dev/null
+++ b/releasenotes/notes/remove-allow_tenant_isolation-option-03f0d998eb498d44.yaml
@@ -0,0 +1,6 @@
+---
+upgrade:
+  - |
+    Remove deprecated config option ``allow_tenant_isolation`` from
+    ``auth`` and ``compute`` groups. Use ``use_dynamic_credentials`` directly
+    instead of the removed option.