diff --git a/public/app/features/alerting/unified/components/rule-editor/QueryRows.tsx b/public/app/features/alerting/unified/components/rule-editor/QueryRows.tsx
index 9db88e23170..d6d7a653dc4 100644
--- a/public/app/features/alerting/unified/components/rule-editor/QueryRows.tsx
+++ b/public/app/features/alerting/unified/components/rule-editor/QueryRows.tsx
@@ -17,6 +17,7 @@ import { queriesWithUpdatedReferences } from './util';
 import { Button, Card, Icon } from '@grafana/ui';
 import { QueryOperationRow } from 'app/core/components/QueryOperationRow/QueryOperationRow';
 import { getDatasourceSrv } from 'app/features/plugins/datasource_srv';
+import { omit } from 'lodash';
 
 interface Props {
   // The query configuration
@@ -108,19 +109,7 @@ export class QueryRows extends PureComponent<Props, State> {
         return item;
       }
 
-      const previous = getDataSourceSrv().getInstanceSettings(item.datasourceUid);
-
-      if (previous?.type === settings.uid) {
-        return {
-          ...item,
-          datasourceUid: settings.uid,
-        };
-      }
-
-      return {
-        ...item,
-        datasourceUid: settings.uid,
-      };
+      return copyModel(item, settings.uid);
     });
     onQueriesChange(updatedQueries);
   };
@@ -291,6 +280,14 @@ export class QueryRows extends PureComponent<Props, State> {
   }
 }
 
+function copyModel(item: AlertQuery, uid: string): Omit<AlertQuery, 'datasource'> {
+  return {
+    ...item,
+    model: omit(item.model, 'datasource'),
+    datasourceUid: uid,
+  };
+}
+
 interface DatasourceNotFoundProps {
   index: number;
   model: AlertDataQuery;