I am managing 100 more sites using Aegir hosting manager. But when i tried to create new aliases for some sites i got the following error in 'verify'

Log message

Task starts processing

Running: php /var/www/aegir/drush/drush.php --root='/var/www/aegir/Malappuram' 'provision' 'verify' 'testing.entegramam.gov.in' --backend

The external command could not be executed due to an application error.

Removing task from hosting queue

An error occurred at function : drush_hosting_hosting_task

Changes for drush_hosting_hosting_task module have been rolled back.

Command dispatch complete

but both site address and aliase are working.

And also i want to know onething : what will happen when i remove a database of aegir created website and recreate a DB with same name ?

I imported another DB to that newly created DB.

Pls reply