fix rule var name

app/Http/Controllers/CampaignVariablesController.php

@@ -14,7 +14,7 @@ class CampaignVariablesController extends Controller
 {
 {
 
 
     private $rule_variable = 'required|exists:variables,id';
     private $rule_variable = 'required|exists:variables,id';
-    private $rule_variable_name = 'required|alpha|regex:/[a-zA-z]/|unique:' . Variable::class . ',name';
+    private $rule_variable_name = 'required|regex:/[0-9]/|unique:' . Variable::class . ',name';
     private $rule_default_value = 'required';
     private $rule_default_value = 'required';
     private $rule_value = '';
     private $rule_value = '';