diff --git a/src/app/priority/controllers/PriorityController.php b/src/app/priority/controllers/PriorityController.php
index d87ab414d1e5dd3c0ca7f208af1a246b0e2cd41e..3317cd6f026255b34eafd259ff4f4eccf6ec335b 100644
--- a/src/app/priority/controllers/PriorityController.php
+++ b/src/app/priority/controllers/PriorityController.php
@@ -38,10 +38,14 @@ class PriorityController
         $check = $check && Validator::stringType()->notEmpty()->validate($data['color']);
         $check = $check && (Validator::intVal()->notEmpty()->validate($data['delays']) || $data['delays'] == null);
         $check = $check && Validator::boolType()->validate($data['working_days']);
+        $check = $check && Validator::boolType()->validate($data['default_priority']);
         if (!$check) {
             return $response->withStatus(400)->withJson(['errors' => 'Bad Request']);
         }
 
+        if ($data['default_priority']) {
+            PriorityModel::resetDefaultPriority();
+        }
         $data['working_days'] = $data['working_days'] ? 'true' : 'false';
         $data['default_priority'] = $data['default_priority'] ? 'true' : 'false';
 
@@ -74,6 +78,9 @@ class PriorityController
             return $response->withStatus(400)->withJson(['errors' => 'Bad Request']);
         }
 
+        if ($data['default_priority']) {
+            PriorityModel::resetDefaultPriority();
+        }
         $data['id'] = $aArgs['id'];
         $data['working_days'] = empty($data['working_days']) ? 'false' : 'true';
         $data['default_priority'] = empty($data['default_priority']) ? 'false' : 'true';
diff --git a/src/app/priority/models/PriorityModelAbstract.php b/src/app/priority/models/PriorityModelAbstract.php
index bcd7c53ea090a9039965d418daa35da8aac46831..ff7873800ea0370eaf18dbf78cee10a4543fb888 100644
--- a/src/app/priority/models/PriorityModelAbstract.php
+++ b/src/app/priority/models/PriorityModelAbstract.php
@@ -96,6 +96,20 @@ abstract class PriorityModelAbstract
         return true;
     }
 
+    public static function resetDefaultPriority()
+    {
+        DatabaseModel::update([
+            'table'     => 'priorities',
+            'set'       => [
+                'default_priority'  => 'false'
+            ],
+            'where'     => ['default_priority = ?'],
+            'data'      => ['true']
+        ]);
+
+        return true;
+    }
+
     public static function delete(array $aArgs)
     {
         ValidatorModel::notEmpty($aArgs, ['id']);