diff --git a/find-dupe-locale.js b/find-dupe-locale.js
new file mode 100644
index 000000000..20b64d4fb
--- /dev/null
+++ b/find-dupe-locale.js
@@ -0,0 +1,23 @@
+const allValues = {};
+
+const localeFile = require('./locales/en/common.json');
+
+for (const [key, value] of Object.entries(localeFile)) {
+  const arr = allValues[value] || [];
+  allValues[value] = arr.concat(key);
+}
+
+const dupValues = {};
+
+for (const [key, value] of Object.entries(allValues)) {
+  if (value.length > 1) {
+    dupValues[key] = value;
+  }
+}
+
+if (Object.keys(dupValues).length) {
+  console.error(`Duplicate values found in locale file: ${Object.keys(dupValues).length}`);
+  for (const [key, value] of Object.entries(dupValues)) {
+    console.error(`${value}: ${key}`);
+  }
+}
diff --git a/kustomize/overlays/demo/kustomization.yaml b/kustomize/overlays/demo/kustomization.yaml
index 31cc7a112..c0e879b2b 100644
--- a/kustomize/overlays/demo/kustomization.yaml
+++ b/kustomize/overlays/demo/kustomization.yaml
@@ -12,4 +12,4 @@ patches:
 
 images:
   - name: boxyhq/jackson
-    newTag: 1.21.3
+    newTag: 1.21.4
diff --git a/kustomize/overlays/prod-eu/kustomization.yaml b/kustomize/overlays/prod-eu/kustomization.yaml
index 31cc7a112..c0e879b2b 100644
--- a/kustomize/overlays/prod-eu/kustomization.yaml
+++ b/kustomize/overlays/prod-eu/kustomization.yaml
@@ -12,4 +12,4 @@ patches:
 
 images:
   - name: boxyhq/jackson
-    newTag: 1.21.3
+    newTag: 1.21.4