SOLAR01 same document type can't be uploaded 2 times?

Dear All,

I have issue in Solution Manager 7.1 sp08 solar01 tcode. We have created nodes for ABAP Functional spec and in that we are uploading the document in project documentation.

We are uploading document type "Program Development Form" for a functional spec and if we are going to upload another document then we are not getting option to upload the document with same document type i.e. "Program Development Form".

Kindly suggest if there are any configuration needs to be done or anything needs to be done.

Regards

Sushant