diff --git a/scripts/src/hwlab-node-web-sentinel-p5.ts b/scripts/src/hwlab-node-web-sentinel-p5.ts
index e8656fd0..e7a1c69c 100644
--- a/scripts/src/hwlab-node-web-sentinel-p5.ts
+++ b/scripts/src/hwlab-node-web-sentinel-p5.ts
@@ -333,7 +333,7 @@ function mergeSentinelReportFindings(primary: readonly Record<string, unknown>[]
   const seen = new Set<string>();
   for (const item of [...primary, ...artifact]) {
     const id = sentinelReportFindingIdentity(item);
-    const key = `${id ?? JSON.stringify(item).slice(0, 160)}:${stringAtNullable(item, "severity") ?? stringAtNullable(item, "level") ?? ""}`;
+    const key = id ?? `${JSON.stringify(item).slice(0, 160)}:${stringAtNullable(item, "severity") ?? stringAtNullable(item, "level") ?? ""}`;
     if (seen.has(key)) continue;
     seen.add(key);
     merged.push(item);
diff --git a/scripts/src/hwlab-node-web-sentinel-service.ts b/scripts/src/hwlab-node-web-sentinel-service.ts
index 2dbc3e6b..5f34adb4 100644
--- a/scripts/src/hwlab-node-web-sentinel-service.ts
+++ b/scripts/src/hwlab-node-web-sentinel-service.ts
@@ -1536,7 +1536,8 @@ function mergeVisibleFindings(primary: readonly Record<string, unknown>[], artif
   const merged: Record<string, unknown>[] = [];
   const seen = new Set<string>();
   for (const item of [...primary, ...artifact]) {
-    const key = `${findingIdentity(item) ?? JSON.stringify(item).slice(0, 160)}:${stringOrNull(item.severity) ?? stringOrNull(item.level) ?? ""}`;
+    const id = findingIdentity(item);
+    const key = id ?? `${JSON.stringify(item).slice(0, 160)}:${stringOrNull(item.severity) ?? stringOrNull(item.level) ?? ""}`;
     if (seen.has(key)) continue;
     seen.add(key);
     merged.push(item);