Only admins can change the heartbeat below 12

app/Http/Requests/SystemRegisterRequest.php

@@ -34,6 +34,7 @@ class SystemRegisterRequest extends FormRequest
 	public function messages(): array
 	{
 		return [
+			'heartbeat' => 'Sorry, only an admin can set this below 12',
 			'hold' => 'Must be Yes or No',
 			'pollmode' => 'Must be Hold, Normal or Crash',
 			'pkt_msgs' => 'Sorry, only an admin can increase this above 100',
@@ -75,14 +76,23 @@ class SystemRegisterRequest extends FormRequest
 			'active' => 'required|boolean',
 			'hold' => 'sometimes|boolean',
 			'pollmode' => 'required|integer|min:0|max:2',
-			'heartbeat' => 'nullable|integer|min:0|max:48',
+			'heartbeat' => [
+				'nullable',
+				'integer',
+				function ($attribute,$value,$fail) {
+					if (($value < 12) && (! Gate::allows('admin')))
+						$fail(true);
+				},
+				'min:0',
+				'max:48'
+			],
 			'pkt_msgs' => [
 				'nullable',
+				'integer',
 				function ($attribute,$value,$fail) {
 					if (($value > 100) && (! Gate::allows('admin')))
 						$fail(true);
 				},
-				'integer',
 				'min:5',
 				'max:65535',
 			],