diff --git a/charts/opentelemetry-operator/templates/NOTES.txt b/charts/opentelemetry-operator/templates/NOTES.txt
index d7ab37708..227ecfef8 100644
--- a/charts/opentelemetry-operator/templates/NOTES.txt
+++ b/charts/opentelemetry-operator/templates/NOTES.txt
@@ -1,3 +1,7 @@
+{{- if not .Values.manager.collectorImage.repository }}
+{{ fail "[ERROR] 'manager.collectorImage.repository' must be set. See https://github.com/open-telemetry/opentelemetry-helm-charts/blob/main/charts/opentelemetry-operator/UPGRADING.md for instructions." }}
+{{ end }}
+
 {{ $.Chart.Name }} has been installed. Check its status by running:
   kubectl --namespace {{ .Release.Namespace }} get pods -l "release={{ $.Release.Name }}"
 
diff --git a/charts/opentelemetry-operator/values.yaml b/charts/opentelemetry-operator/values.yaml
index 7de517ec6..61049edf5 100644
--- a/charts/opentelemetry-operator/values.yaml
+++ b/charts/opentelemetry-operator/values.yaml
@@ -42,7 +42,7 @@ manager:
     tag: ""
   collectorImage:
     repository: ""
-    tag: 0.100.0
+    tag: ""
   opampBridgeImage:
     repository: ""
     tag: ""