diff --git a/application/migrations/076_theme_table.php b/application/migrations/076_theme_table.php
index 9bcf6ce8..4dcc9b86 100644
--- a/application/migrations/076_theme_table.php
+++ b/application/migrations/076_theme_table.php
@@ -5,17 +5,18 @@ class Migration_Theme_table extends CI_Migration {
 	public function up()
 	{
 		// create themes table
-		$this->db->query("create table themes (id integer not null auto_increment, name varchar(256) not null, foldername varchar(256) not null, primary key (id)) ENGINE=myisam DEFAULT CHARSET=utf8;");
-		$this->db->query("INSERT INTO themes (name, foldername) values ('Blue','blue');");
-		$this->db->query("INSERT INTO themes (name, foldername) values ('Cosmo','cosmo');");
-		$this->db->query("INSERT INTO themes (name, foldername) values ('Cyborg (Dark)','cyborg');");
-		$this->db->query("INSERT INTO themes (name, foldername) values ('Darkly (Dark)','darkly');");
-		$this->db->query("INSERT INTO themes (name, foldername) values ('Default','default');");
-		$this->db->query("INSERT INTO themes (name, foldername) values ('Superhero (Dark)','superhero');");
+		if (!$this->db->table_exists('themes')) {
+			$this->db->query("create table themes (id integer not null auto_increment, name varchar(256) not null, foldername varchar(256) not null, primary key (id)) ENGINE=myisam DEFAULT CHARSET=utf8;");
+			$this->db->query("INSERT INTO themes (name, foldername) values ('Blue','blue');");
+			$this->db->query("INSERT INTO themes (name, foldername) values ('Cosmo','cosmo');");
+			$this->db->query("INSERT INTO themes (name, foldername) values ('Cyborg (Dark)','cyborg');");
+			$this->db->query("INSERT INTO themes (name, foldername) values ('Darkly (Dark)','darkly');");
+			$this->db->query("INSERT INTO themes (name, foldername) values ('Default','default');");
+			$this->db->query("INSERT INTO themes (name, foldername) values ('Superhero (Dark)','superhero');");
+        }
 	}
 
 	public function down(){
 		$this->db->query("");
-
 	}
 }
diff --git a/application/migrations/077_add_userid_to_notes.php b/application/migrations/077_add_userid_to_notes.php
index 280dd4e9..e15f3043 100644
--- a/application/migrations/077_add_userid_to_notes.php
+++ b/application/migrations/077_add_userid_to_notes.php
@@ -9,7 +9,9 @@ class Migration_add_userid_to_notes extends CI_Migration
 			'user_id BIGINT(20) DEFAULT NULL',
 		);
 
-		$this->dbforge->add_column('notes', $fields);
+		if (!$this->db->field_exists('user_id', 'notes')) {
+			$this->dbforge->add_column('notes', $fields);
+		}
 	}
 
 	public function down()
diff --git a/application/migrations/078_add_userid_to_hardware.php b/application/migrations/078_add_userid_to_hardware.php
index 8abba611..9edb4fd4 100644
--- a/application/migrations/078_add_userid_to_hardware.php
+++ b/application/migrations/078_add_userid_to_hardware.php
@@ -10,7 +10,9 @@ class Migration_add_userid_to_hardware extends CI_Migration {
 			'user_id BIGINT(20) DEFAULT NULL',
 		);
 
-		$this->dbforge->add_column('cat', $fields);
+		if (!$this->db->field_exists('user_id', 'cat')) {
+			$this->dbforge->add_column('cat', $fields);
+		}
 	}
 
 	public function down()