diff --git a/src/backend/InvenTree/InvenTree/exceptions.py b/src/backend/InvenTree/InvenTree/exceptions.py
index cece1162a8..1538b27001 100644
--- a/src/backend/InvenTree/InvenTree/exceptions.py
+++ b/src/backend/InvenTree/InvenTree/exceptions.py
@@ -33,6 +33,9 @@ def log_error(path, error_name=None, error_info=None, error_data=None):
     """
     from error_report.models import Error
 
+    if not path:
+        path = ''
+
     kind, info, data = sys.exc_info()
 
     # Check if the error is on the ignore list
@@ -104,17 +107,19 @@ def exception_handler(exc, context):
         else:
             error_detail = _('Error details can be found in the admin panel')
 
+        request = context.get('request')
+        path = request.path if request else ''
+
         response_data = {
             'error': type(exc).__name__,
             'error_class': str(type(exc)),
             'detail': error_detail,
-            'path': context['request'].path,
+            'path': path,
             'status_code': 500,
         }
 
         response = Response(response_data, status=500)
-
-        log_error(context['request'].path)
+        log_error(path)
 
     if response is not None:
         # Convert errors returned under the label '__all__' to 'non_field_errors'
diff --git a/src/backend/InvenTree/build/serializers.py b/src/backend/InvenTree/build/serializers.py
index 845cd584bd..d4526d5338 100644
--- a/src/backend/InvenTree/build/serializers.py
+++ b/src/backend/InvenTree/build/serializers.py
@@ -244,7 +244,12 @@ class BuildOutputSerializer(serializers.Serializer):
             if not build.is_output_fully_allocated(output):
 
                 # Check if the user has specified that incomplete allocations are ok
-                accept_incomplete = InvenTree.helpers.str2bool(self.context['request'].data.get('accept_incomplete_allocation', False))
+                if request := self.context.get('request'):
+                    accept_incomplete = InvenTree.helpers.str2bool(
+                        request.data.get('accept_incomplete_allocation', False)
+                    )
+                else:
+                    accept_incomplete = False
 
                 if not accept_incomplete:
                     raise ValidationError(_("This build output is not fully allocated"))
@@ -426,6 +431,7 @@ class BuildOutputCreateSerializer(serializers.Serializer):
         """Generate the new build output(s)"""
         data = self.validated_data
 
+        request = self.context.get('request')
         build = self.get_build()
 
         build.create_build_output(
@@ -434,7 +440,7 @@ class BuildOutputCreateSerializer(serializers.Serializer):
             batch=data.get('batch_code', ''),
             location=data.get('location', None),
             auto_allocate=data.get('auto_allocate', False),
-            user=self.context['request'].user,
+            user=request.user if request else None,
         )
 
 
@@ -528,7 +534,7 @@ class BuildOutputScrapSerializer(serializers.Serializer):
     def save(self):
         """Save the serializer to scrap the build outputs"""
         build = self.context['build']
-        request = self.context['request']
+        request = self.context.get('request')
         data = self.validated_data
         outputs = data.get('outputs', [])
 
@@ -541,7 +547,7 @@ class BuildOutputScrapSerializer(serializers.Serializer):
                     output,
                     quantity,
                     data.get('location', None),
-                    user=request.user,
+                    user=request.user if request else None,
                     notes=data.get('notes', ''),
                     discard_allocations=data.get('discard_allocations', False)
                 )
@@ -617,7 +623,7 @@ class BuildOutputCompleteSerializer(serializers.Serializer):
     def save(self):
         """Save the serializer to complete the build outputs."""
         build = self.context['build']
-        request = self.context['request']
+        request = self.context.get('request')
 
         data = self.validated_data
 
@@ -638,7 +644,7 @@ class BuildOutputCompleteSerializer(serializers.Serializer):
 
                 build.complete_build_output(
                     output,
-                    request.user,
+                    request.user if request else None,
                     location=location,
                     status=status,
                     notes=notes,
@@ -711,12 +717,12 @@ class BuildCancelSerializer(serializers.Serializer):
     def save(self):
         """Cancel the specified build"""
         build = self.context['build']
-        request = self.context['request']
+        request = self.context.get('request')
 
         data = self.validated_data
 
         build.cancel_build(
-            request.user,
+            request.user if request else None,
             remove_allocated_stock=data.get('remove_allocated_stock', False),
             remove_incomplete_outputs=data.get('remove_incomplete_outputs', False),
         )
@@ -826,15 +832,18 @@ class BuildCompleteSerializer(serializers.Serializer):
         return data
 
     def save(self):
-        """Complete the specified build output"""
-        request = self.context['request']
+        """Complete the specified build output."""
+        request = self.context.get('request')
         build = self.context['build']
 
         data = self.validated_data
 
         build.complete_build(
-            request.user,
-            trim_allocated_stock=data.get('accept_overallocated', OverallocationChoice.REJECT) == OverallocationChoice.TRIM
+            request.user if request else None,
+            trim_allocated_stock=data.get(
+                'accept_overallocated', OverallocationChoice.REJECT
+            )
+            == OverallocationChoice.TRIM,
         )
 
 
diff --git a/src/backend/InvenTree/common/serializers.py b/src/backend/InvenTree/common/serializers.py
index aa6240d8d2..07c0fc87ad 100644
--- a/src/backend/InvenTree/common/serializers.py
+++ b/src/backend/InvenTree/common/serializers.py
@@ -251,8 +251,8 @@ class NotificationMessageSerializer(InvenTreeModelSerializer):
                 target['link'] = obj.target_object.get_absolute_url()
             else:
                 # check if user is staff - link to admin
-                request = self.context['request']
-                if request.user and request.user.is_staff:
+                request = self.context.get('request')
+                if request and request.user and request.user.is_staff:
                     meta = obj.target_object._meta
 
                     try:
diff --git a/src/backend/InvenTree/importer/models.py b/src/backend/InvenTree/importer/models.py
index 28e3a94c32..ad06193d37 100644
--- a/src/backend/InvenTree/importer/models.py
+++ b/src/backend/InvenTree/importer/models.py
@@ -141,6 +141,7 @@ class DataImportSession(models.Model):
 
         - Extract column names from the data file
         - Create a default mapping for each field in the serializer
+        - Find a default "backup" value for each field (if one exists)
         """
         # Extract list of column names from the file
         self.columns = importer.operations.extract_column_names(self.data_file)
@@ -154,6 +155,7 @@ class DataImportSession(models.Model):
 
         matched_columns = set()
 
+        self.field_defaults = self.field_defaults or {}
         field_overrides = self.field_overrides or {}
 
         # Create a default mapping for each available field in the database
@@ -163,6 +165,10 @@ class DataImportSession(models.Model):
             if field in field_overrides:
                 continue
 
+            # Extract a "default" value for the field, if one exists
+            if 'default' in field_def:
+                self.field_defaults[field] = field_def['default']
+
             # Generate a list of possible column names for this field
             field_options = [
                 field,
@@ -554,7 +560,7 @@ class DataImportRow(models.Model):
         if not available_fields:
             available_fields = self.session.available_fields()
 
-        overrride_values = self.override_values
+        override_values = self.override_values
         default_values = self.default_values
 
         data = {}
@@ -562,8 +568,8 @@ class DataImportRow(models.Model):
         # We have mapped column (file) to field (serializer) already
         for field, col in field_mapping.items():
             # Data override (force value and skip any further checks)
-            if field in overrride_values:
-                data[field] = overrride_values[field]
+            if field in override_values:
+                data[field] = override_values[field]
                 continue
 
             # Default value (if provided)
@@ -615,16 +621,19 @@ class DataImportRow(models.Model):
 
         return data
 
-    def construct_serializer(self):
+    def construct_serializer(self, request=None):
         """Construct a serializer object for this row."""
         if serializer_class := self.session.serializer_class:
-            return serializer_class(data=self.serializer_data())
+            return serializer_class(
+                data=self.serializer_data(), context={'request': request}
+            )
 
-    def validate(self, commit=False) -> bool:
+    def validate(self, commit=False, request=None) -> bool:
         """Validate the data in this row against the linked serializer.
 
         Arguments:
             commit: If True, the data is saved to the database (if validation passes)
+            request: The request object (if available) for extracting user information
 
         Returns:
             True if the data is valid, False otherwise
@@ -636,7 +645,7 @@ class DataImportRow(models.Model):
             # Row has already been completed
             return True
 
-        serializer = self.construct_serializer()
+        serializer = self.construct_serializer(request=request)
 
         if not serializer:
             self.errors = {
@@ -658,12 +667,12 @@ class DataImportRow(models.Model):
                 try:
                     serializer.save()
                     self.complete = True
-                    self.save()
 
-                    self.session.check_complete()
-
-                except Exception as e:
+                except ValueError as e:  # Exception as e:
                     self.errors = {'non_field_errors': str(e)}
                     result = False
 
+                self.save()
+                self.session.check_complete()
+
         return result
diff --git a/src/backend/InvenTree/importer/operations.py b/src/backend/InvenTree/importer/operations.py
index d29471b282..e718ec5f7f 100644
--- a/src/backend/InvenTree/importer/operations.py
+++ b/src/backend/InvenTree/importer/operations.py
@@ -72,6 +72,8 @@ def extract_column_names(data_file) -> list:
     headers = []
 
     for idx, header in enumerate(data.headers):
+        header = header.strip()
+
         if header:
             headers.append(header)
         else:
diff --git a/src/backend/InvenTree/importer/serializers.py b/src/backend/InvenTree/importer/serializers.py
index ac68056f55..779a1a0d90 100644
--- a/src/backend/InvenTree/importer/serializers.py
+++ b/src/backend/InvenTree/importer/serializers.py
@@ -207,8 +207,10 @@ class DataImportAcceptRowSerializer(serializers.Serializer):
         """Complete the provided rows."""
         rows = self.validated_data['rows']
 
+        request = self.context.get('request', None)
+
         for row in rows:
-            row.validate(commit=True)
+            row.validate(commit=True, request=request)
 
         if session := self.context.get('session', None):
             session.check_complete()
diff --git a/src/backend/InvenTree/order/serializers.py b/src/backend/InvenTree/order/serializers.py
index bf6aa32fcf..eae5ff3155 100644
--- a/src/backend/InvenTree/order/serializers.py
+++ b/src/backend/InvenTree/order/serializers.py
@@ -933,7 +933,7 @@ class PurchaseOrderReceiveSerializer(serializers.Serializer):
         """Perform the actual database transaction to receive purchase order items."""
         data = self.validated_data
 
-        request = self.context['request']
+        request = self.context.get('request')
         order = self.context['order']
 
         items = data['items']
@@ -956,7 +956,7 @@ class PurchaseOrderReceiveSerializer(serializers.Serializer):
                         item['line_item'],
                         loc,
                         item['quantity'],
-                        request.user,
+                        request.user if request else None,
                         status=item['status'],
                         barcode=item.get('barcode', ''),
                         batch_code=item.get('batch_code', ''),
@@ -1416,8 +1416,8 @@ class SalesOrderShipmentCompleteSerializer(serializers.ModelSerializer):
 
         data = self.validated_data
 
-        request = self.context['request']
-        user = request.user
+        request = self.context.get('request')
+        user = request.user if request else None
 
         # Extract shipping date (defaults to today's date)
         now = current_date()
@@ -1554,10 +1554,10 @@ class SalesOrderCompleteSerializer(OrderAdjustSerializer):
 
     def save(self):
         """Save the serializer to complete the SalesOrder."""
-        request = self.context['request']
+        request = self.context.get('request')
         data = self.validated_data
 
-        user = getattr(request, 'user', None)
+        user = request.user if request else None
 
         self.order.ship_order(
             user, allow_incomplete_lines=str2bool(data.get('accept_incomplete', False))
@@ -2002,7 +2002,7 @@ class ReturnOrderReceiveSerializer(serializers.Serializer):
     def save(self):
         """Saving this serializer marks the returned items as received."""
         order = self.context['order']
-        request = self.context['request']
+        request = self.context.get('request')
 
         data = self.validated_data
         items = data['items']
@@ -2015,7 +2015,7 @@ class ReturnOrderReceiveSerializer(serializers.Serializer):
                 order.receive_line_item(
                     line_item,
                     location,
-                    request.user,
+                    request.user if request else None,
                     note=data.get('note', ''),
                     status=item.get('status', None),
                 )
diff --git a/src/backend/InvenTree/part/serializers.py b/src/backend/InvenTree/part/serializers.py
index 66001ff930..cf6dba418c 100644
--- a/src/backend/InvenTree/part/serializers.py
+++ b/src/backend/InvenTree/part/serializers.py
@@ -682,7 +682,7 @@ class PartSerializer(
     Used when displaying all details of a single component.
     """
 
-    import_exclude_fields = ['duplicate']
+    import_exclude_fields = ['creation_date', 'creation_user', 'duplicate']
 
     class Meta:
         """Metaclass defining serializer fields."""
@@ -1061,8 +1061,8 @@ class PartSerializer(
         instance = super().create(validated_data)
 
         # Save user information
-        if self.context['request']:
-            instance.creation_user = self.context['request'].user
+        if request := self.context.get('request'):
+            instance.creation_user = request.user
             instance.save()
 
         # Copy data from original Part
@@ -1122,7 +1122,9 @@ class PartSerializer(
                     part=instance, quantity=quantity, location=location
                 )
 
-                stockitem.save(user=self.context['request'].user)
+                request = self.context.get('request', None)
+                user = request.user if request else None
+                stockitem.save(user=user)
 
         # Create initial supplier information
         if initial_supplier:
@@ -1221,9 +1223,8 @@ class PartStocktakeSerializer(InvenTree.serializers.InvenTreeModelSerializer):
         data = self.validated_data
 
         # Add in user information automatically
-        request = self.context['request']
-        data['user'] = request.user
-
+        request = self.context.get('request')
+        data['user'] = request.user if request else None
         super().save()
 
 
diff --git a/src/backend/InvenTree/report/migrations/0026_auto_20240422_1301.py b/src/backend/InvenTree/report/migrations/0026_auto_20240422_1301.py
index 5a37adf331..11556acee5 100644
--- a/src/backend/InvenTree/report/migrations/0026_auto_20240422_1301.py
+++ b/src/backend/InvenTree/report/migrations/0026_auto_20240422_1301.py
@@ -46,9 +46,7 @@ def convert_legacy_labels(table_name, model_name, template_model):
         try:
             cursor.execute(query)
         except Exception:
-            # Table likely does not exist
-            if not InvenTree.ready.isInTestMode():
-                print(f"\nLegacy label table {table_name} not found - skipping migration")
+            # Table likely does not exist - database was created more recently
             return 0
 
         rows = cursor.fetchall()
diff --git a/src/backend/InvenTree/stock/serializers.py b/src/backend/InvenTree/stock/serializers.py
index 6b7ac858b4..0b05bc4df2 100644
--- a/src/backend/InvenTree/stock/serializers.py
+++ b/src/backend/InvenTree/stock/serializers.py
@@ -762,8 +762,8 @@ class SerializeStockItemSerializer(serializers.Serializer):
     def save(self):
         """Serialize stock item."""
         item = self.context['item']
-        request = self.context['request']
-        user = request.user
+        request = self.context.get('request')
+        user = request.user if request else None
 
         data = self.validated_data