diff --git a/shell/edit/monitoring.coreos.com.prometheusrule/AlertingRule.vue b/shell/edit/monitoring.coreos.com.prometheusrule/AlertingRule.vue
index 359d3006552..2cdb1f00761 100644
--- a/shell/edit/monitoring.coreos.com.prometheusrule/AlertingRule.vue
+++ b/shell/edit/monitoring.coreos.com.prometheusrule/AlertingRule.vue
@@ -102,7 +102,7 @@ export default {
           if (isEmpty(this.value?.annotations)) {
             this.value['annotations'] = { summary: '' };
           } else {
-            this.value.annotations['summary'] = '';
+            this.value.annotations = { ...this.value.annotations, summary: '' };
           }
         } else {
           this.value.annotations['summary'] = '';
@@ -124,7 +124,7 @@ export default {
           if (isEmpty(this.value?.annotations)) {
             this.value['annotations'] = { message: '' };
           } else {
-            this.value.annotations['message'] = '';
+            this.value.annotations = { ...this.value.annotations, message: '' };
           }
         } else {
           this.value.annotations['message'] = '';
@@ -146,7 +146,7 @@ export default {
           if (isEmpty(this.value?.annotations)) {
             this.value['annotations'] = { description: '' };
           } else {
-            this.value.annotations['description'] = '';
+            this.value.annotations = { ...this.value.annotations, description: '' };
           }
         } else {
           this.value.annotations['description'] = '';
@@ -168,7 +168,7 @@ export default {
           if (isEmpty(this.value?.annotations)) {
             this.value['annotations'] = { runbook_url: '' };
           } else {
-            this.value.annotations['runbook_url'] = '';
+            this.value.annotations = { ...this.value.annotations, runbook_url: '' };
           }
         } else {
           this.value.annotations['runbook_url'] = '';