diff --git a/app/Migrations/Schema/V110/Version20150803171220.php b/app/Migrations/Schema/V110/Version20150803171220.php
index 62cb0ba9d1..3ad80cca8e 100644
--- a/app/Migrations/Schema/V110/Version20150803171220.php
+++ b/app/Migrations/Schema/V110/Version20150803171220.php
@@ -21,8 +21,9 @@ class Version20150803171220 extends AbstractMigrationChamilo
         $this->addSql('UPDATE user SET username_canonical = username');
         $this->addSql('ALTER TABLE user ADD confirmation_token VARCHAR(255) NULL');
         $this->addSql('ALTER TABLE user ADD password_requested_at DATETIME DEFAULT NULL');
-
-        $schema->renameTable('track_e_exercices', 'track_e_exercises');
+        $this->addSql('RENAME TABLE track_e_exercices TO track_e_exercises');
+        // This drops the old table
+        // $schema->renameTable('track_e_exercices', 'track_e_exercises');
     }
 
     /**
diff --git a/main/install/update-files-1.9.0-1.10.0.inc.php b/main/install/update-files-1.9.0-1.10.0.inc.php
index 17191f807e..f647185bd3 100644
--- a/main/install/update-files-1.9.0-1.10.0.inc.php
+++ b/main/install/update-files-1.9.0-1.10.0.inc.php
@@ -164,21 +164,7 @@ if (defined('SYSTEM_INSTALLATION')) {
         unlink(api_get_path(SYS_PATH).'courses/.htaccess');
     }
 
-    // Delete all "courses/ABC/index.php" files.
-
-    $finder = new Finder();
-    $dirs = $finder->directories()->in(api_get_path(SYS_APP_PATH).'courses');
-    $fs = new Filesystem();
-    /** @var Symfony\Component\Finder\SplFileInfo $dir */
-    foreach ($dirs as $dir) {
-        $indexFile = $dir->getPath().'/index.php';
-        if ($fs->exists($indexFile)) {
-            $fs->remove($indexFile);
-        }
-    }
-
     // Move dirs into new structures.
-
     $movePathList = [
         api_get_path(SYS_CODE_PATH).'upload/users/groups' => api_get_path(SYS_UPLOAD_PATH),
         api_get_path(SYS_CODE_PATH).'upload/users' => api_get_path(SYS_UPLOAD_PATH),
@@ -194,18 +180,40 @@ if (defined('SYSTEM_INSTALLATION')) {
         }
     }
 
-    // Remove archive
-    @rrmdir(api_get_path(SYS_PATH).'archive');
+
+    // Delete all "courses/ABC/index.php" files.
+    $finder = new Finder();
+
+    $courseDir = api_get_path(SYS_APP_PATH).'courses';
+    if (is_dir($courseDir)) {
+        $dirs = $finder->directories()->in($courseDir);
+        $fs = new Filesystem();
+        /** @var Symfony\Component\Finder\SplFileInfo $dir */
+        foreach ($dirs as $dir) {
+            $indexFile = $dir->getPath().'/index.php';
+            if ($fs->exists($indexFile)) {
+                $fs->remove($indexFile);
+            }
+        }
+    }
 
     // Remove old "courses" folder if empty
-    $dirs = $finder->directories()->in(api_get_path(SYS_PATH).'courses');
-    $files = $finder->directories()->in(api_get_path(SYS_PATH).'courses');
-    $dirCount = $dirs->count();
-    $fileCount = $dirs->count();
-    if ($fileCount == 0 && $dirCount == 0) {
-        @rrmdir(api_get_path(SYS_PATH).'courses');
+    $originalCourseDir = api_get_path(SYS_PATH).'courses';
+
+    if (is_dir($originalCourseDir)) {
+        $dirs = $finder->directories()->in($originalCourseDir);
+        $files = $finder->directories()->in($originalCourseDir);
+        $dirCount = $dirs->count();
+        $fileCount = $dirs->count();
+        if ($fileCount == 0 && $dirCount == 0) {
+            @rrmdir(api_get_path(SYS_PATH).'courses');
+        }
     }
 
+
+    // Remove archive
+    @rrmdir(api_get_path(SYS_PATH).'archive');
+
 } else {
     echo 'You are not allowed here !'. __FILE__;
 }