diff --git a/modules/ncenterlite/ncenterlite.admin.controller.php b/modules/ncenterlite/ncenterlite.admin.controller.php
index 412775dba..6feb287f0 100644
--- a/modules/ncenterlite/ncenterlite.admin.controller.php
+++ b/modules/ncenterlite/ncenterlite.admin.controller.php
@@ -165,7 +165,11 @@ class ncenterliteAdminController extends ncenterlite
 			$this->setMessage('ncenterlite_message_delete_notification_all');
 		}
 
-		$this->removeAllFlagFile();
+		$reg_obj = new stdClass();
+		$reg_obj->regdate = time();
+
+		$flag_path = \RX_BASEDIR . 'files/cache/ncenterlite/new_notify/delete_date.php';
+		Rhymix\Framework\Storage::writePHPData($flag_path, $reg_obj);
 
 		if(Context::get('success_return_url'))
 		{
@@ -204,13 +208,4 @@ class ncenterliteAdminController extends ncenterlite
 			$this->setRedirectUrl(getNotEncodedUrl('', 'module', 'admin', 'act', 'dispNcenterliteAdminCustomList'));
 		}
 	}
-
-	function removeAllFlagFile()
-	{
-		$flag_path = \RX_BASEDIR . 'files/cache/ncenterlite/new_notify/';
-		if(FileHandler::isDir($flag_path))
-		{
-			FileHandler::removeFilesInDir($flag_path);
-		}
-	}
 }
diff --git a/modules/ncenterlite/ncenterlite.controller.php b/modules/ncenterlite/ncenterlite.controller.php
index 591f8dedf..d4cb57daf 100644
--- a/modules/ncenterlite/ncenterlite.controller.php
+++ b/modules/ncenterlite/ncenterlite.controller.php
@@ -65,7 +65,7 @@ class ncenterliteController extends ncenterlite
 		}
 		else
 		{
-			self::removeFlagFile($args->member_srl);
+			$this->removeFlagFile($args->member_srl);
 		}
 		return new Object();
 	}
@@ -443,7 +443,7 @@ class ncenterliteController extends ncenterlite
 			foreach($member_srls as $member_srl)
 			{
 				//Remove flag files
-				self::removeFlagFile($member_srl);
+				$this->removeFlagFile($member_srl);
 			}
 		}
 
@@ -498,7 +498,7 @@ class ncenterliteController extends ncenterlite
 			foreach($member_srls as $member_srl)
 			{
 				//Remove flag files
-				self::removeFlagFile($member_srl);
+				$this->removeFlagFile($member_srl);
 			}
 		}
 		return new Object();
@@ -548,7 +548,7 @@ class ncenterliteController extends ncenterlite
 				if($output_update->toBool())
 				{
 					//Remove flag files
-					self::removeFlagFile($args->member_srl);
+					$this->removeFlagFile($args->member_srl);
 				}
 			}
 		}
@@ -570,7 +570,7 @@ class ncenterliteController extends ncenterlite
 					if($outputs->toBool())
 					{
 						//Remove flag files
-						self::removeFlagFile($args->member_srl);
+						$this->removeFlagFile($args->member_srl);
 					}
 				}
 			}
@@ -617,7 +617,7 @@ class ncenterliteController extends ncenterlite
 				if($update_output->toBool())
 				{
 					//Remove flag files
-					self::removeFlagFile($args->member_srl);
+					$this->removeFlagFile($args->member_srl);
 				}
 			}
 		}
@@ -678,7 +678,7 @@ class ncenterliteController extends ncenterlite
 				if($output->toBool())
 				{
 					//Remove flag files
-					self::removeFlagFile($args->member_srl);
+					$this->removeFlagFile($args->member_srl);
 				}
 			}
 		}
@@ -692,7 +692,7 @@ class ncenterliteController extends ncenterlite
 			if($output->toBool())
 			{
 				//Remove flag files
-				self::removeFlagFile($args->member_srl);
+				$this->removeFlagFile($args->member_srl);
 			}
 		}
 
@@ -923,7 +923,7 @@ class ncenterliteController extends ncenterlite
 		//$output = executeQuery('ncenterlite.deleteNotify', $args);
 
 		//Remove flag files
-		self::removeFlagFile($args->member_srl);
+		$this->removeFlagFile($args->member_srl);
 		return $output;
 	}
 
@@ -936,7 +936,7 @@ class ncenterliteController extends ncenterlite
 		//$output = executeQuery('ncenterlite.deleteNotifyByTargetSrl', $args);
 
 		//Remove flag files
-		self::removeFlagFile($args->member_srl);
+		$this->removeFlagFile($args->member_srl);
 		return $output;
 	}
 
@@ -948,7 +948,7 @@ class ncenterliteController extends ncenterlite
 		//$output = executeQuery('ncenterlite.deleteNotifyByMemberSrl', $args);
 
 		//Remove flag files
-		self::removeFlagFile($args->member_srl);
+		$this->removeFlagFile($args->member_srl);
 		return $output;
 	}
 
@@ -1096,7 +1096,7 @@ class ncenterliteController extends ncenterlite
 			}
 		}
 
-		self::removeFlagFile($args->member_srl);
+		$this->removeFlagFile($args->member_srl);
 
 		return $output;
 	}
@@ -1118,7 +1118,7 @@ class ncenterliteController extends ncenterlite
 		FileHandler::writeFile($flag_path, $buff);
 	}
 
-	public static function removeFlagFile($member_srl = null)
+	public function removeFlagFile($member_srl = null)
 	{
 		if($member_srl === null)
 		{
diff --git a/modules/ncenterlite/ncenterlite.model.php b/modules/ncenterlite/ncenterlite.model.php
index 54ff10e8a..edf962e11 100644
--- a/modules/ncenterlite/ncenterlite.model.php
+++ b/modules/ncenterlite/ncenterlite.model.php
@@ -224,13 +224,30 @@ class ncenterliteModel extends ncenterlite
 
 		if(FileHandler::exists($flag_path) && $page <= 1)
 		{
-			$output = require_once $flag_path;
-			if(is_object($output))
+			$deleteFlagPath = \RX_BASEDIR . 'files/cache/ncenterlite/new_notify/delete_date.php';
+
+			$deleteOutput = Rhymix\Framework\Storage::readPHPData($deleteFlagPath);
+			if($deleteOutput !== false)
 			{
-				$output->flag_exists = true;
-				return $output;
+				$create_time = filemtime($flag_path);
+
+				if($create_time <= $deleteOutput->regdate)
+				{
+					$oNcenterliteController = getController('ncenterlite');
+					$oNcenterliteController->removeFlagFile($member_srl);
+				}
+				else
+				{
+					$output = Rhymix\Framework\Storage::readPHPData($flag_path);
+					if($output !== false)
+					{
+						$output->flag_exists = true;
+						return $output;
+					}
+				}
 			}
 		}
+
 		$args = new stdClass();
 		$args->member_srl = $member_srl;
 		$args->page = $page ? $page : 1;