From 253dce54bdd03ea374dd046305b4c1cd854279ed Mon Sep 17 00:00:00 2001
From: Kim Schaefer <kim@defenseunicorns.com>
Date: Tue, 29 Oct 2024 12:07:41 -0600
Subject: [PATCH] fixed error message

---
 src/lib/metrics.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lib/metrics.ts b/src/lib/metrics.ts
index 4f919e28e..8ec036848 100644
--- a/src/lib/metrics.ts
+++ b/src/lib/metrics.ts
@@ -173,7 +173,9 @@ export class MetricsCollector {
 
     if (maxCacheMissWindows !== undefined && this.#cacheMissWindows.size >= maxCacheMissWindows) {
       const firstKey = this.#cacheMissWindows.keys().next().value;
-      this.#cacheMissWindows.delete(firstKey);
+      if (firstKey !== undefined) {
+        this.#cacheMissWindows.delete(firstKey);
+      }
       this.#gauges.get(this.#getMetricName(this.#metricNames.cacheMiss))?.remove({ window: firstKey });
     }
   };