Improved error handling (#10352) (#10354)

- Closes https://github.com/inventree/InvenTree/issues/10338

(cherry picked from commit f4333bd83f)

Co-authored-by: Oliver <oliver.henry.walters@gmail.com>

src/backend/InvenTree/report/apps.py

@@ -4,7 +4,7 @@ import logging
 import os
 
 from django.apps import AppConfig
-from django.core.exceptions import AppRegistryNotReady
+from django.core.exceptions import AppRegistryNotReady, ValidationError
 from django.core.files.base import ContentFile
 from django.core.files.storage import default_storage
 from django.db.utils import IntegrityError, OperationalError, ProgrammingError
@@ -52,6 +52,8 @@ class ReportConfig(AppConfig):
             try:
                 self.create_default_labels()
                 self.create_default_reports()
+            except ValidationError:
+                logger.warning('Validation error when creating default templates')
             except (
                 AppRegistryNotReady,
                 IntegrityError,
@@ -162,6 +164,10 @@ class ReportConfig(AppConfig):
                     **template, template=self.file_from_template('label', filename)
                 )
                 logger.info("Creating new label template: '%s'", template['name'])
+            except ValidationError:
+                logger.warning(
+                    "Could not create label template: '%s'", template['name']
+                )
             except Exception:
                 InvenTree.exceptions.log_error('create_default_labels', scope='init')
 
@@ -261,5 +267,9 @@ class ReportConfig(AppConfig):
                     **template, template=self.file_from_template('report', filename)
                 )
                 logger.info("Created new report template: '%s'", template['name'])
+            except ValidationError:
+                logger.warning(
+                    "Could not create report template: '%s'", template['name']
+                )
             except Exception:
                 InvenTree.exceptions.log_error('create_default_reports', scope='init')