fixed migration cock up

application/config/migration.php

@@ -21,7 +21,7 @@ $config['migration_enabled'] = TRUE;
 | be upgraded / downgraded to.
 |
 */
-$config['migration_version'] = 20;
+$config['migration_version'] = 28;
 
 /*
 |--------------------------------------------------------------------------

application/migrations/024_add_column_logbookid.php

@@ -15,6 +15,6 @@ class Migration_add_column_logbookid extends CI_Migration {
 
         public function down()
         {
-                $this->dbforge->drop_column('logbook_id', $this->config->item('table_name'));
+                echo "not possible";
         }
 }

application/migrations/025_create_logbook_table.php

@@ -28,6 +28,6 @@ class Migration_create_logbook_table extends CI_Migration {
 
         public function down()
         {
-                $this->dbforge->drop_table('logbooks');
+                echo "not possible";
         }
 }

application/migrations/026_addfield_to_logbooks_default.php

@@ -15,6 +15,6 @@ class Migration_addfield_to_logbooks_default extends CI_Migration {
 
         public function down()
         {
-                $this->dbforge->drop_column('default_logbook', 'logbooks');
+                echo "not possible";
         }
 }

application/migrations/027_addfield_to_logbooks_active.php

@@ -15,6 +15,6 @@ class Migration_addfield_to_logbooks_active extends CI_Migration {
 
         public function down()
         {
-                $this->dbforge->drop_column('active_logbook', 'logbooks');
+                echo "not possible";
         }
 }