diff --git a/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_column_definitions.py b/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_column_definitions.py
index 2f74f2e20eded95fbed6348d2df11b5c3932a744..10557cb01c39fbb523db34a77f03e6b0b0945abe 100644
--- a/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_column_definitions.py
+++ b/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_column_definitions.py
@@ -17,7 +17,7 @@
 #
 import re
 
-from datetime import date, datetime
+from datetime import date
 from dateutil.relativedelta import relativedelta
 from typing import Union
 
@@ -87,11 +87,6 @@ DATATYPE_DEFINITIONS = _use_custom_names({
     "Storage ID": str,
     "StorageTemperature": str,
     "Subevent": str,
-    "Time collected start": str,
-    "Time collected stop": str,
-    "Time sampled start": str,
-    "Time sampled stop": str,
-    "Timezone": str,
     "Water depth start": float,
     "Water depth stop": float,
 })
@@ -161,11 +156,6 @@ SPECIAL_TREATMENT_SAMPLE = _use_custom_names([
     "Storage Container Label",
     "Storage ID",
     "Subevent",
-    "Time collected start",
-    "Time collected stop",
-    "Time sampled start",
-    "Time sampled stop",
-    "Timezone",
     "Water depth start",
     "Water depth stop",
 ])