While importing the requirements under same requirement specification in Reqtify , we end up with below deletion issue . please suggest .

It is deleting the objects present in the Req specification in 3DX and adding new requirements to the same specification . Is there any options/settings to keep the requirements without deleting . I mean append the new reqs to the existing requiremnt specification 

Scenario :

importing different Reqif file with spec objects keeping the same name of prev Requirement specification (already objects are there under this spec in 3DX)