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+# Troubleshooting
+## INSTALLATION FAILED: rendered manifests contain a resource that already exists
+
+### TrueNAS SCALE
+
+If you get
+
+![Error message: [EFAULT] Failed to install App: Error: INSTALLATION FAILED: rendered manifests contain a resource that already exists. Unable to continue with install: CustomResourceDefinition "alertmanagerconfigs.monitoring.coreos.com" in namespace "" exists and cannot be imported into the current release: invalid ownership metadata; label validation error: missing key "app.kubernetes.io/managed-by": must be set to "Helm"; annotation validation error: missing key "meta.helm.sh/release-name": must be set to "prometheus-operator"; annotation validation error: missing key "meta.helm.sh/release-namespace": must be set to "ix-prometheus-operator"](images/install_error_message.webp)
+
+>[EFAULT] Failed to install App: Error: INSTALLATION FAILED: rendered manifests contain a resource that already exists. Unable to continue with install: CustomResourceDefinition "alertmanagerconfigs.monitoring.coreos.com" in namespace "" exists and cannot be imported into the current release: invalid ownership metadata; label validation error: missing key "app.kubernetes.io/managed-by": must be set to "Helm"; annotation validation error: missing key "meta.helm.sh/release-name": must be set to "prometheus-operator"; annotation validation error: missing key "meta.helm.sh/release-namespace": must be set to "ix-prometheus-operator"
+
+you should follow instructions from the [FAQ](https://truecharts.org/manual/FAQ#prometheus-operator) to resolve it
+
+### Helm
+
+
+On Helm this indicates your previously had a non-TrueCharts version of Prometheus-Operator installed.
+Please uninstall all old CRD's before installing our version of Prometheus Operator.
+
+If you don't know how, this might be a good moment to do some research or ask yourself if running DIY clusters is a good idea for your specific knowlage level.
+
+