diff --git a/.github/sonar-suppressions.json b/.github/sonar-suppressions.json
index acf418c3..403946d1 100644
--- a/.github/sonar-suppressions.json
+++ b/.github/sonar-suppressions.json
@@ -10,6 +10,10 @@
       "id": "S1144",
       "reason": "Unused private types or members should be removed - false positives on reflection/serialization patterns"
     },
+    {
+      "id": "S1192",
+      "reason": "String literals should not be duplicated - guard clause exception messages are inline by .NET convention, not localizable strings"
+    },
     {
       "id": "S1244",
       "reason": "Floating point numbers should not be tested for equality - intentional exact comparisons in financial calculations"