Hello Yasemin,
I have used that option. But the delete tasks always deletes all the existing requests except for the last three new ones. Ex. I have created one request with a filter 2008-2011 another with filter 2012 (manually running DTP). Then I run the chain that creates three new requests for 2013, 2014 and 2015. In the step delete requsts from qube with the setting "Same or More Comprehensive" both the 2008-2011 and 2012 were deleted.
Jiri