diff --git a/Tracking/TrkVertexFitter/TrkJetVxFitter/src/KalmanVertexOnJetAxisUpdator.cxx b/Tracking/TrkVertexFitter/TrkJetVxFitter/src/KalmanVertexOnJetAxisUpdator.cxx
index 5420e865ee580d2cc439238c4c3fb16324438733..b15c87439b0428dddd5ca98b561d1c50c5fcc858 100755
--- a/Tracking/TrkVertexFitter/TrkJetVxFitter/src/KalmanVertexOnJetAxisUpdator.cxx
+++ b/Tracking/TrkVertexFitter/TrkJetVxFitter/src/KalmanVertexOnJetAxisUpdator.cxx
@@ -238,8 +238,8 @@ namespace Trk{
     const Amg::MatrixX & old_full_vrt_cov = myPosition.covariancePosition();
     Eigen::FullPivLU<Amg::MatrixX> lu_decomp(old_full_vrt_cov);
     if(!lu_decomp.isInvertible()){
-      ATH_MSG_WARNING ("The vertex-positions covariance matrix is not invertible");
-      ATH_MSG_WARNING ("The copy of initial vertex returned");
+      ATH_MSG_DEBUG ("The vertex-positions covariance matrix is not invertible");
+      ATH_MSG_DEBUG ("The copy of initial vertex returned");
       return Trk::RecVertexPositions(myPosition);
     }