diff --git a/f_install/j_setup_db.php b/f_install/j_setup_db.php
index 7e47fc8a..a4550e9d 100644
--- a/f_install/j_setup_db.php
+++ b/f_install/j_setup_db.php
@@ -124,7 +124,14 @@ $rootDB->error_handler = 'dbSQLFail';
 $mysqli_obj = $rootDB->get(); //로그인에 실패할 경우 자동으로 dbConnFail()이 실행됨.
 
 if($mysqli_obj->multi_query(file_get_contents(__dir__.'/sql/common_schema.sql'))){
-    while (@$mysqli_obj->next_result()) {;}
+    while(true){
+        if (!$mysqli_obj->more_results()) {
+            break;
+        }
+        if(!$mysqli_obj->next_result()){
+            break;
+        }
+    }
 }
 
 $rootDB->insert('system', array(
diff --git a/twe/func_gamerule.php b/twe/func_gamerule.php
index 85880114..e9e230c7 100644
--- a/twe/func_gamerule.php
+++ b/twe/func_gamerule.php
@@ -207,26 +207,20 @@ function SetNationFront($nationNo) {
     $adj = [];
 
     $db = DB::db();
-    $warNations = $db->queryFirstColumn(
-        'SELECT you from diplomacy where me = %i and (state=0 or (state=1 and term<=3))'
+    $enemyCities = $db->queryFirstColumn(
+        'SELECT city from city where nation IN 
+            (SELECT you from diplomacy where me = %i and (state=0 or (state=1 and term<=3)))'
         , $nationNo
     );
-    if($warNations) {
-        foreach($warNations as $warNation){
-            $enemyCities = $db->queryFirstColumn('SELECT city from city where nation=%i', $warNation);
-            foreach($enemyCities as $city){
-                foreach(CityConst::byID($city)->path as $adjCity){
-                    $adj[$adjCity] = 1;
-                }
-            }
+    if($enemyCities) {
+        foreach($enemyCities as $city){
+            $adj = array_merge($adj, CityConst::byID($city)->path);
         }
     } else {
         //평시이면 공백지
         //NOTE: if, else일 경우 NPC는 전쟁시에는 공백지로 출병하지 않는다는 뜻이 된다.
         foreach ($db->queryFirstColumn('SELECT city,path from city where nation=0') as $city) {
-            foreach(CityConst::byID($city)->path as $adjCity){
-                $adj[$adjCity] = 1;
-            }
+            $adj = array_merge($adj, CityConst::byID($city)->path);
         }
     }
 
diff --git a/twe/j_install.php b/twe/j_install.php
index 3e4bc3eb..4056ad36 100644
--- a/twe/j_install.php
+++ b/twe/j_install.php
@@ -63,11 +63,26 @@ $scenarioObj = new Scenario($scenario);
 $startyear = $scenarioObj->getYear();
 
 if($mysqli_obj->multi_query(file_get_contents(__dir__.'/sql/reset.sql'))){
-    while (@$mysqli_obj->next_result()) {;}
+    while(true){
+        if (!$mysqli_obj->more_results()) {
+            break;
+        }
+        if(!$mysqli_obj->next_result()){
+            break;
+        }
+    }
+    
 }
 
 if($mysqli_obj->multi_query(file_get_contents(__dir__.'/sql/schema.sql'))){
-    while (@$mysqli_obj->next_result()) {;}
+    while(true){
+        if (!$mysqli_obj->more_results()) {
+            break;
+        }
+        if(!$mysqli_obj->next_result()){
+            break;
+        }
+    }
 }
 
 
diff --git a/twe/j_install_db.php b/twe/j_install_db.php
index ec78e1cf..bfeda051 100644
--- a/twe/j_install_db.php
+++ b/twe/j_install_db.php
@@ -30,7 +30,14 @@ if($fullReset && class_exists('\\sammo\\DB')){
     $mysqli_obj = DB::db()->get();
 
     if($mysqli_obj->multi_query(file_get_contents(__dir__.'/sql/reset.sql'))){
-        while (@$mysqli_obj->next_result()) {;}
+        while(true){
+            if (!$mysqli_obj->more_results()) {
+                break;
+            }
+            if(!$mysqli_obj->next_result()){
+                break;
+            }
+        }
     }
 }