diff --git a/public/app/features/dashboard/state/DashboardMigrator.ts b/public/app/features/dashboard/state/DashboardMigrator.ts
index 7c0acd29ff3..7a09a5e357b 100644
--- a/public/app/features/dashboard/state/DashboardMigrator.ts
+++ b/public/app/features/dashboard/state/DashboardMigrator.ts
@@ -957,10 +957,13 @@ function upgradeValueMappingsForPanel(panel: PanelModel) {
 
   fieldConfig.defaults.mappings = upgradeValueMappings(fieldConfig.defaults.mappings, fieldConfig.defaults.thresholds);
 
-  for (const override of fieldConfig.overrides) {
-    for (const prop of override.properties) {
-      if (prop.id === 'mappings') {
-        prop.value = upgradeValueMappings(prop.value);
+  // Protect against no overrides
+  if (Array.isArray(fieldConfig.overrides)) {
+    for (const override of fieldConfig.overrides) {
+      for (const prop of override.properties) {
+        if (prop.id === 'mappings') {
+          prop.value = upgradeValueMappings(prop.value);
+        }
       }
     }
   }