diff --git a/src/nomad_measurements/catalytic_measurement/catalytic_measurement.py b/src/nomad_measurements/catalytic_measurement/catalytic_measurement.py
index 8337471d..035cedcc 100644
--- a/src/nomad_measurements/catalytic_measurement/catalytic_measurement.py
+++ b/src/nomad_measurements/catalytic_measurement/catalytic_measurement.py
@@ -273,7 +273,6 @@ def normalize(self, archive, logger):
             if self.m_root().data.samples is not None:
                 self.sample_reference = self.m_root().data.samples[0].reference
         if self.sample_reference is not None:
-            print(self.m_root().data.samples)
             if self.m_root().data.samples == []:
                 sample1_reference = CompositeSystemReference(reference=self.sample_reference)
                 self.m_root().data.samples.append(sample1_reference)