diff --git a/src/store/metricsStore.ts b/src/store/metricsStore.ts
index 4d4748c..ed7f154 100644
--- a/src/store/metricsStore.ts
+++ b/src/store/metricsStore.ts
@@ -56,6 +56,10 @@ export const useMetricsStore = create<MetricsState>((set, get) => ({
 
     addToAllHistory: (metric) =>
         set((state) => {
+            const key = `${metric.node}|${metric.timestamp}`;
+            if (state.allHistory.some((m) => `${m.node}|${m.timestamp}` === key)) {
+                return state;
+            }
             const newAll = [...state.allHistory, metric].slice(-MAX_HISTORY);
             return { allHistory: newAll };
         }),