OSDOCS#6251: Release note for warning on duplicate short names

release_notes/ocp-4-16-release-notes.adoc

@@ -80,6 +80,17 @@ This release introduces the following updates to the *Developer* perspective of
 [id="ocp-4-16-openshift-cli"]
 === OpenShift CLI (oc)
 
+[id="ocp-4-16-duplicate-short-name-warning"]
+==== Warning for duplicate resource short names
+
+With this release, if you query a resource by using its short name, the OpenShift CLI  (`oc`) returns a warning if more than one custom resource definition (CRD) with the same short name exists in the cluster.
+
+.Example warning
+[source,terminal]
+----
+Warning: short name "ex" could also match lower priority resource examples.test.com
+----
+
 [id="ocp-4-16-ibm-z"]
 === {ibm-z-title} and {ibm-linuxone-title}