diff --git a/backend/migrations-init/m200309_075759_populate_levels.php b/backend/migrations-init/m200309_075759_populate_levels.php
index 49f38a2fe..0102d9446 100644
--- a/backend/migrations-init/m200309_075759_populate_levels.php
+++ b/backend/migrations-init/m200309_075759_populate_levels.php
@@ -7,49 +7,48 @@
  */
 class m200309_075759_populate_levels extends Migration
 {
-  public $experiences=[
-    ['name'=>'New', 'description'=>'User just started', 'icon'=> 'default.png'],
-    ['name'=>'Securitas', 'description'=>'test', 'icon'=> 'default.png'],
-    ['name'=>'PenTester', 'description'=>'test', 'icon'=> 'default.png'],
-    ['name'=>'CTFer', 'description'=>'test', 'icon'=> 'default.png'],
-    ['name'=>'Hax0r', 'description'=>'test', 'icon'=> 'default.png'],
+  public $experiences = [
+    ['name' => 'New', 'description' => 'User just started', 'icon' => 'default.png'],
+    ['name' => 'Securitas', 'description' => 'test', 'icon' => 'default.png'],
+    ['name' => 'PenTester', 'description' => 'test', 'icon' => 'default.png'],
+    ['name' => 'CTFer', 'description' => 'test', 'icon' => 'default.png'],
+    ['name' => 'Hax0r', 'description' => 'test', 'icon' => 'default.png'],
   ];
-    /**
-     * {@inheritdoc}
-     */
-    public function safeUp()
-    {
-      $min_points=0;
-      $max_points=1000;
-      $step=1000;
-      $dyn=1;
-      $lvl=0;
-      for($i=0;$i < 20;$i++)
-      {
-        $xp=[];
-        $xp['id']=intval($i + 1);
-        $xp['name']=sprintf("%s %d", $this->experiences[$lvl]['name'], ($dyn % 5));
-        $xp['category']=sprintf("%s", $this->experiences[$lvl]['name']);
-        $xp['description']='autogen';
-        $xp['icon']='default.png';
-        $xp['min_points']=intval($min_points);
-        $xp['max_points']=intval($max_points + ($step * ($i == 0 ? $i : $i + 1)));
-        $this->db->createCommand()->insert('{{%experience}}', $xp)->execute();
-        $max_points=$xp['max_points'];
-        $min_points=$max_points + 1;
-        if(($dyn % 4) == 0)
-        {
-$lvl++;$dyn=0;}
-        $dyn++;
+  /**
+   * {@inheritdoc}
+   */
+  public function safeUp()
+  {
+    $min_points = 0;
+    $max_points = 1000;
+    $step = 1000;
+    $dyn = 1;
+    $lvl = 0;
+    for ($i = 0; $i < 20; $i++) {
+      $xp = [];
+      $xp['id'] = intval($i + 1);
+      $xp['name'] = sprintf("%s %d", $this->experiences[$lvl]['name'], ($dyn % 5));
+      $xp['category'] = sprintf("%s", $this->experiences[$lvl]['name']);
+      $xp['description'] = 'autogen';
+      $xp['icon'] = 'default.png';
+      $xp['min_points'] = intval($min_points);
+      $xp['max_points'] = intval($max_points + ($step * ($i == 0 ? $i : $i + 1)));
+      $this->upsert('{{%experience}}', $xp);
+      $max_points = $xp['max_points'];
+      $min_points = $max_points + 1;
+      if (($dyn % 4) == 0) {
+        $lvl++;
+        $dyn = 0;
       }
+      $dyn++;
     }
+  }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function safeDown()
-    {
-      $this->db->createCommand()->truncateTable('{{%experience}}')->execute();
-    }
-
+  /**
+   * {@inheritdoc}
+   */
+  public function safeDown()
+  {
+    $this->db->createCommand()->truncateTable('{{%experience}}')->execute();
+  }
 }
diff --git a/backend/migrations-init/m200309_081940_populate_countries.php b/backend/migrations-init/m200309_081940_populate_countries.php
index 540de878d..26388af76 100644
--- a/backend/migrations-init/m200309_081940_populate_countries.php
+++ b/backend/migrations-init/m200309_081940_populate_countries.php
@@ -12,8 +12,8 @@ class m200309_081940_populate_countries extends Migration
      */
     public function safeUp()
     {
-      $CREATE_SQL="INSERT INTO country VALUES ('UNK', 'Not set');
-INSERT INTO country VALUES ('AF','Afghanistan'),
+      $CREATE_SQL="INSERT IGNORE INTO country VALUES ('UNK', 'Not set');
+INSERT IGNORE INTO country VALUES ('AF','Afghanistan'),
       ('AL','Albania'),('DZ','Algeria'),('AS','American Samoa'),('AD','Andorra'),('AO','Angola'),
       ('AI','Anguilla'),('AQ','Antarctica'),('AG','Antigua and Barbuda'),('AR','Argentina'),
       ('AM','Armenia'),('AW','Aruba'),('AU','Australia'),('AT','Austria'),('AZ','Azerbaijan'),
@@ -81,8 +81,7 @@ public function safeUp()
       ('GB','United Kingdom'),('US','United States'),('UM','United States Minor Outlying Islands'),
       ('UY','Uruguay'),('UZ','Uzbekistan'),('VU','Vanuatu'),('VE','Venezuela'),('VN','Viet Nam'),
       ('VG','Virgin Islands, British'),('VI','Virgin Islands, U.s.'),('WF','Wallis and Futuna'),
-      ('EH','Western Sahara'),('YE','Yemen'),('ZM','Zambia'),('ZW','Zimbabwe');
-";
+      ('EH','Western Sahara'),('YE','Yemen'),('ZM','Zambia'),('ZW','Zimbabwe')";
       $this->db->createCommand($CREATE_SQL)->execute();
 
     }
diff --git a/backend/migrations-init/m200309_082230_populate_avatars.php b/backend/migrations-init/m200309_082230_populate_avatars.php
index d6f27ca30..a80f23f1c 100644
--- a/backend/migrations-init/m200309_082230_populate_avatars.php
+++ b/backend/migrations-init/m200309_082230_populate_avatars.php
@@ -12,54 +12,13 @@ class m200309_082230_populate_avatars extends Migration
      */
     public function safeUp()
     {
-      $CREATE_SQL="INSERT INTO avatar value ('256_10.png');
-                   INSERT INTO avatar value ('256_11.png');
-                   INSERT INTO avatar value ('256_12.png');
-                   INSERT INTO avatar value ('256_13.png');
-                   INSERT INTO avatar value ('256_14.png');
-                   INSERT INTO avatar value ('256_15.png');
-                   INSERT INTO avatar value ('256_16.png');
-                   INSERT INTO avatar value ('256_1.png');
-                   INSERT INTO avatar value ('256_2.png');
-                   INSERT INTO avatar value ('256_3.png');
-                   INSERT INTO avatar value ('256_4.png');
-                   INSERT INTO avatar value ('256_5.png');
-                   INSERT INTO avatar value ('256_6.png');
-                   INSERT INTO avatar value ('256_7.png');
-                   INSERT INTO avatar value ('256_8.png');
-                   INSERT INTO avatar value ('256_9.png');
-                   INSERT INTO avatar value ('avatar-1.png');
-                   INSERT INTO avatar value ('avatar-2.png');
-                   INSERT INTO avatar value ('avatar-3.png');
-                   INSERT INTO avatar value ('avatar-4.png');
-                   INSERT INTO avatar value ('avatar-5.png');
-                   INSERT INTO avatar value ('avatar-6.png');
-                   INSERT INTO avatar value ('avatar-7.png');
-                   INSERT INTO avatar value ('avatar-8.png');
-                   INSERT INTO avatar value ('Bride.png');
-                   INSERT INTO avatar value ('default.png');
-                   INSERT INTO avatar value ('Franky.png');
-                   INSERT INTO avatar value ('Skeleton.png');
-                   INSERT INTO avatar value ('users-10.svg');
-                   INSERT INTO avatar value ('users-11.svg');
-                   INSERT INTO avatar value ('users-12.svg');
-                   INSERT INTO avatar value ('users-13.svg');
-                   INSERT INTO avatar value ('users-14.svg');
-                   INSERT INTO avatar value ('users-15.svg');
-                   INSERT INTO avatar value ('users-16.svg');
-                   INSERT INTO avatar value ('users-1.svg');
-                   INSERT INTO avatar value ('users-2.svg');
-                   INSERT INTO avatar value ('users-3.svg');
-                   INSERT INTO avatar value ('users-4.svg');
-                   INSERT INTO avatar value ('users-5.svg');
-                   INSERT INTO avatar value ('users-6.svg');
-                   INSERT INTO avatar value ('users-7.svg');
-                   INSERT INTO avatar value ('users-8.svg');
-                   INSERT INTO avatar value ('users-9.svg');
-                   INSERT INTO avatar value ('Vampire-Girl.png');
-                   INSERT INTO avatar value ('Vampire.png');
-                   INSERT INTO avatar value ('Witch.png');
-";
+      $CREATE_SQL="INSERT IGNORE INTO avatar value ('256_10.png'),('256_11.png'),('256_12.png'),('256_13.png'),('256_14.png'),
+('256_15.png'),('256_16.png'), ('256_1.png'), ('256_2.png'), ('256_3.png'), ('256_4.png'), ('256_5.png'), ('256_6.png'),
+('256_7.png'), ('256_8.png'), ('256_9.png'), ('avatar-1.png'), ('avatar-2.png'), ('avatar-3.png'), ('avatar-4.png'), ('avatar-5.png'),
+('avatar-6.png'), ('avatar-7.png'), ('avatar-8.png'), ('Bride.png'), ('default.png'), ('Franky.png'),
+('Skeleton.png'), ('users-10.svg'), ('users-11.svg'), ('users-12.svg'), ('users-13.svg'), ('users-14.svg'), ('users-15.svg'),
+('users-16.svg'), ('users-1.svg'), ('users-2.svg'), ('users-3.svg'), ('users-4.svg'), ('users-5.svg'), ('users-6.svg'),
+('users-7.svg'), ('users-8.svg'), ('users-9.svg'), ('Vampire-Girl.png'), ('Vampire.png'), ('Witch.png')";
             $this->db->createCommand($CREATE_SQL)->execute();
     }
 
diff --git a/backend/migrations-init/m200309_094731_populate_hints.php b/backend/migrations-init/m200309_094731_populate_hints.php
index d40c0ae8f..bd16af92c 100644
--- a/backend/migrations-init/m200309_094731_populate_hints.php
+++ b/backend/migrations-init/m200309_094731_populate_hints.php
@@ -12,7 +12,7 @@ class m200309_094731_populate_hints extends Migration
      */
     public function safeUp()
     {
-      $this->db->createCommand("insert into hint (id,title) values (-1,'Welcome to the gig')")->execute();
+      $this->upsert("hint",['id'=>-1,'title'=>'Welcome to the gig']);
 
     }