Please run the below queries in the database and then later try deleting the Site.

First you need to identify the siteid which could be got from the URL on the browser when you click on the Site which you want to delete.These queries will not delete any Requests but just set the deptid and the siteid to  null for all those requests associated.

If you need to delete many Sites you may need to find the Siteid for all of them and insert it at the end of the query in brackets with comma separated.

If the database is MYSQL:

You can connect to the database through the following command on the server machine:
cmd> cd C:\AdventNet\ME\Servicedesk\mysql\bin
cmd> mysql.exe -u root -P 33366 servicedesk

If you are using MSSQL,execute the query in the New query analyzer:

update Workorder set slaid=null where slaid in (select slaid from sladefinition where siteid in ('siteid'));

update Workorder set siteid =null where siteid in ('siteid');

update workorder set deptid= null where deptid in (Select deptid from departmentdefinition where siteid in('siteid'));

update userdepartment set deptid= null where deptid in (Select deptid from departmentdefinition where siteid in ('siteid'));

update resourceowner set deptid= null where deptid in (Select deptid from departmentdefinition where siteid in ('siteid'));

update resourceownerhistory set deptid= null where deptid in (Select deptid from departmentdefinition where siteid in ('siteid'));

update PurchaseCCDepartment set deptid= null where deptid in (Select deptid from departmentdefinition where siteid in ('siteid'));

Once the above queries are executed you may try deleting the Site.

Maljeev.

Thank you this worked.

To help those new to this sql stuff. down load MS SQL management studio exporess (free) and then connect to the database. then right click and open a new query and enter all the lines as stated above..replace the siteid with the one found  in the Organization Details -  Site page. click on the site that you want to delete and look at the URL it tells you the site ID. replace the site id with this number and execute the command.