diff --git a/public/app/plugins/datasource/graphite/MetricTankMetaInspector.tsx b/public/app/plugins/datasource/graphite/MetricTankMetaInspector.tsx
index 703b0df0030..5009ddae751 100644
--- a/public/app/plugins/datasource/graphite/MetricTankMetaInspector.tsx
+++ b/public/app/plugins/datasource/graphite/MetricTankMetaInspector.tsx
@@ -20,7 +20,7 @@ export class MetricTankMetaInspector extends PureComponent<Props, State> {
     const buckets = parseSchemaRetentions(meta['schema-retentions']);
     const rollupNotice = getRollupNotice([meta]);
     const runtimeNotice = getRuntimeConsolidationNotice([meta]);
-    const normFunc = (meta['consolidator-normfetch'] || '').replace('Consolidator', '');
+    const normFunc = (meta['consolidator-normfetch'] ?? '').replace('Consolidator', '');
 
     let totalSeconds = 0;
 
@@ -99,7 +99,7 @@ export class MetricTankMetaInspector extends PureComponent<Props, State> {
       if (series.meta && series.meta.custom) {
         for (const metaItem of series.meta.custom.seriesMetaList as MetricTankSeriesMeta[]) {
           // key is to dedupe as many series will have identitical meta
-          const key = `${metaItem['schema-name']}-${metaItem['archive-read']}`;
+          const key = `${JSON.stringify(metaItem)}`;
 
           if (seriesMetas[key]) {
             seriesMetas[key].count += metaItem.count;
diff --git a/public/app/plugins/datasource/graphite/meta.ts b/public/app/plugins/datasource/graphite/meta.ts
index 074451a6208..06d12334e02 100644
--- a/public/app/plugins/datasource/graphite/meta.ts
+++ b/public/app/plugins/datasource/graphite/meta.ts
@@ -38,7 +38,7 @@ export function getRollupNotice(metaList: MetricTankSeriesMeta[]): QueryResultMe
     if (archiveIndex > 0) {
       const schema = parseSchemaRetentions(meta['schema-retentions']);
       const intervalString = schema[archiveIndex].interval;
-      const func = meta['consolidator-normfetch'].replace('Consolidator', '');
+      const func = (meta['consolidator-normfetch'] ?? '').replace('Consolidator', '');
 
       return {
         text: `Data is rolled up, aggregated over ${intervalString} using ${func} function`,
@@ -56,7 +56,7 @@ export function getRuntimeConsolidationNotice(metaList: MetricTankSeriesMeta[]):
     const runtimeNr = meta['aggnum-rc'];
 
     if (runtimeNr > 0) {
-      const func = meta['consolidator-rc'].replace('Consolidator', '');
+      const func = (meta['consolidator-rc'] ?? '').replace('Consolidator', '');
 
       return {
         text: `Data is runtime consolidated, ${runtimeNr} datapoints combined using ${func} function`,