diff --git a/hwe/sammo/DiplomaticMessage.php b/hwe/sammo/DiplomaticMessage.php
index 4a7f2c7a..212c02aa 100644
--- a/hwe/sammo/DiplomaticMessage.php
+++ b/hwe/sammo/DiplomaticMessage.php
@@ -72,7 +72,7 @@ class DiplomaticMessage extends Message{
 
     protected function noAggression(){
         $year = Util::array_get($this->msgOption['year']);
-        $option = Util::array_get($this->msgOption['option']);
+        $option = Util::array_get($this->msgOption['option'])??'';
         if($year < 1 || $year > 30){
             return [self::INVALID, '올바르지 않은 불가침 서신입니다.'];
         }
diff --git a/hwe/sammo/Engine/Diplomacy.php b/hwe/sammo/Engine/Diplomacy.php
index 6ebb40d4..89f0a40a 100644
--- a/hwe/sammo/Engine/Diplomacy.php
+++ b/hwe/sammo/Engine/Diplomacy.php
@@ -79,7 +79,7 @@ class Diplomacy{
         }
 
         if(!$this->srcNation || !$this->destNation || !$this->valid){
-            return [ScoutMessage::DECLINED, '이미 멸망한 국가입니다.'];
+            return [DiplomaticMessage::DECLINED, '올바르지 않은 국가입니다.'];
         }
 
         if($this->srcNation['level'] == 0 || $this->destNation['level'] == 0){