diff --git a/script.tjfields.php b/script.tjfields.php
index 141ad392..faf551b5 100755
--- a/script.tjfields.php
+++ b/script.tjfields.php
@@ -44,6 +44,11 @@ class Com_TjfieldsInstallerScript
 	 */
 	public function preflight($type, $parent)
 	{
+		// Delete sql file if exist as related column is added through script
+		if (JFile::exists(JPATH_SITE . '/administrator/components/com_tjfields/sql/updates/mysql/1.3.1.sql'))
+		{
+			JFile::delete($image);
+		}
 	}
 
 	/**
@@ -371,12 +376,6 @@ public function fix_db_on_update()
 			}
 		}
 
-		// Delete sql file if exist as related column is added through script
-		if (JFile::exists(JPATH_SITE . '/administrator/components/com_tjfields/sql/updates/mysql/1.3.1.sql'))
-		{
-			JFile::delete($image);
-		}
-
 		if (!in_array('showonlist', $field_array))
 		{
 			$query = "ALTER TABLE `#__tjfields_fields` ADD COLUMN `showonlist` tinyint(1) NOT NULL";