diff --git a/singer_sdk/sinks/core.py b/singer_sdk/sinks/core.py
index f41d3d97fb..54086363ed 100644
--- a/singer_sdk/sinks/core.py
+++ b/singer_sdk/sinks/core.py
@@ -544,7 +544,8 @@ def _parse_timestamps_in_record(
         """
         for key, value in record.items():
             if key not in schema["properties"]:
-                self.logger.warning("No schema for record field '%s'", key)
+                if value != None:
+                    self.logger.warning("No schema for record field '%s'", key)
                 continue
             datelike_type = get_datelike_property_type(schema["properties"][key])
             if datelike_type: