diff --git a/InvenTree/InvenTree/validators.py b/InvenTree/InvenTree/validators.py
index 6ad49bc837..76d485cef9 100644
--- a/InvenTree/InvenTree/validators.py
+++ b/InvenTree/InvenTree/validators.py
@@ -166,7 +166,7 @@ def validate_part_name_format(self):
     """
 
     jinja_template_regex = re.compile('{{.*?}}')
-    field_name_regex = re.compile('(?<=part\\.)[A-z]*')
+    field_name_regex = re.compile('(?<=part\\.)[A-z]+')
     for jinja_template in jinja_template_regex.findall(str(self)):
         # make sure at least one and only one field is present inside the parser
         field_names = field_name_regex.findall(jinja_template)
diff --git a/InvenTree/common/models.py b/InvenTree/common/models.py
index cadb64814d..d4f26af739 100644
--- a/InvenTree/common/models.py
+++ b/InvenTree/common/models.py
@@ -25,6 +25,7 @@ from django.core.exceptions import ValidationError
 
 import InvenTree.helpers
 import InvenTree.fields
+import InvenTree.validators
 
 import logging
 
@@ -707,7 +708,7 @@ class InvenTreeSetting(BaseInvenTreeSetting):
             'description': _('Format to display the part name'),
             'default': "{{ part.IPN if part.IPN }}{{ ' | ' if part.IPN }}{{ part.name }}{{ ' | ' if part.revision }}"
                        "{{ part.revision if part.revision }}",
-            'validator': InvenTree.fields.validate_part_name_format
+            'validator': InvenTree.validators.validate_part_name_format
         },
 
         'REPORT_DEBUG_MODE': {