diff --git a/src/climetlab/readers/grib/output.py b/src/climetlab/readers/grib/output.py
index dbf15db8..3b45cff4 100644
--- a/src/climetlab/readers/grib/output.py
+++ b/src/climetlab/readers/grib/output.py
@@ -134,6 +134,10 @@ def write(
             for k in NOT_IN_EDITION_1:
                 metadata.pop(k, None)
 
+        if int(metadata.get("deleteLocalDefinition", 0)):
+            for k in ("class", "type", "stream", "expver", "setLocalDefinition"):
+                metadata.pop(k, None)
+
         LOG.debug("GribOutput.metadata %s", metadata)
 
         for k, v in metadata.items():
diff --git a/src/climetlab/sources/constants.py b/src/climetlab/sources/constants.py
index b806c499..8d55012b 100644
--- a/src/climetlab/sources/constants.py
+++ b/src/climetlab/sources/constants.py
@@ -10,7 +10,6 @@
 import datetime
 import itertools
 import logging
-from warnings import warn
 
 import numpy as np
 
@@ -153,7 +152,7 @@ def sin_local_time(self, date):
         return np.sin(radians)
 
     def insolation(self, date):
-        warn("The function `insolation` is deprecated, please use `cos_solar_zenith_angle` instead")
+        # warn("The function `insolation` is deprecated, please use `cos_solar_zenith_angle` instead")
         return self.cos_solar_zenith_angle(date)
 
     def toa_incident_solar_radiation(self, date):