diff --git a/install_minimal/upgrades/airtime-2.1.0/common/Version20120410143340.php b/install_minimal/upgrades/airtime-2.1.0/common/Version20120410143340.php
index 2d1a64fa5..dc320edbe 100644
--- a/install_minimal/upgrades/airtime-2.1.0/common/Version20120410143340.php
+++ b/install_minimal/upgrades/airtime-2.1.0/common/Version20120410143340.php
@@ -18,7 +18,6 @@ class Version20120410143340 extends AbstractMigration
         $this->_addSql("ALTER TABLE cc_playlist ADD CONSTRAINT cc_playlist_createdby_fkey FOREIGN KEY (creator_id) REFERENCES cc_subjs(id) NOT DEFERRABLE INITIALLY IMMEDIATE");
 
         $this->_addSql("ALTER TABLE cc_playlist ADD utime timestamp(6)");
-        $this->_addSql("ALTER TABLE cc_playlist ADD mtime timestamp(6)");
     }
 
     public function down(Schema $schema)