diff --git a/app/Http/Controllers/Api/CustomFieldsController.php b/app/Http/Controllers/Api/CustomFieldsController.php
index 8feb2a116..c42e68b67 100644
--- a/app/Http/Controllers/Api/CustomFieldsController.php
+++ b/app/Http/Controllers/Api/CustomFieldsController.php
@@ -95,7 +95,14 @@ class CustomFieldsController extends Controller
         $field = new CustomField;
 
         $data = $request->all();
-        $validator = Validator::make($data, $field->validationRules());
+        $regex_format = null;
+        
+        if (str_contains($data["format"], "regex:")){
+            $regex_format = $data["format"];
+        }
+
+        $validator = Validator::make($data, $field->validationRules($regex_format));
+
         if ($validator->fails()) {
             return response()->json(Helper::formatStandardApiResponse('error', null, $validator->errors()));
         }
diff --git a/app/Models/CustomField.php b/app/Models/CustomField.php
index 724a323f4..76ae0dd0f 100644
--- a/app/Models/CustomField.php
+++ b/app/Models/CustomField.php
@@ -353,7 +353,7 @@ class CustomField extends Model
     * @since [v4.1.10]
     * @return array
     */
-    public function validationRules()
+    public function validationRules($regex_format = null)
     {
         return [
             "name" => "required|unique:custom_fields",
@@ -362,7 +362,7 @@ class CustomField extends Model
                 Rule::in(['text', 'listbox',  'textarea', 'checkbox', 'radio'])
             ],
             'format' => [
-                Rule::in(array_merge(array_keys(CustomField::PREDEFINED_FORMATS), CustomField::PREDEFINED_FORMATS))
+                Rule::in(array_merge(array_keys(CustomField::PREDEFINED_FORMATS), CustomField::PREDEFINED_FORMATS, [$regex_format]))
             ],
             'field_encrypted' => "nullable|boolean"
         ];
diff --git a/resources/views/locations/view.blade.php b/resources/views/locations/view.blade.php
index 31e645369..e28908119 100644
--- a/resources/views/locations/view.blade.php
+++ b/resources/views/locations/view.blade.php
@@ -160,10 +160,10 @@
 			<a href="{{ route('locations.edit', ['location' => $location->id]) }}" style="width: 50%;" class="btn btn-sm btn-primary pull-left">{{ trans('admin/locations/table.update') }} </a>
 		</div>
         <div class="col-md-12" style="padding-top: 5px;">
-			<a href="{{ route('locations.print_assigned', ['location' => $location->id]) }}" style="width: 50%;" class="btn btn-sm btn-default pull-left">{{ trans('admin/locations/table.print_assigned') }} </a>
+			<a href="{{ route('locations.print_assigned', ['locationId' => $location->id]) }}" style="width: 50%;" class="btn btn-sm btn-default pull-left">{{ trans('admin/locations/table.print_assigned') }} </a>
 		</div>
 		<div class="col-md-12" style="padding-top: 5px;">
-			<a href="{{ route('locations.print_all_assigned', ['location' => $location->id]) }}" style="width: 50%;" class="btn btn-sm btn-default pull-left">{{ trans('admin/locations/table.print_all_assigned') }} </a>
+			<a href="{{ route('locations.print_all_assigned', ['locationId' => $location->id]) }}" style="width: 50%;" class="btn btn-sm btn-default pull-left">{{ trans('admin/locations/table.print_all_assigned') }} </a>
 		</div>
 		
   </div>