diff --git a/cmd/core-runtime/main.go b/cmd/core-runtime/main.go
index 1fdad2b..4e12960 100644
--- a/cmd/core-runtime/main.go
+++ b/cmd/core-runtime/main.go
@@ -827,6 +827,7 @@ func main() {
 			return
 		}
 		if err := capabilityRepository.SaveCognitiveDiscovery(r.Context(), registration); err != nil {
+			log.Printf("cognitive discovery persistence failed: %v", err)
 			http.Error(w, "save cognitive discovery", http.StatusInternalServerError)
 			return
 		}