So I have used the following command to deploy a solution to SharePoint as I am a new commer to SharePoint developement.
stsadm -o addsolution -filename Demo.wsp
I used WSPBuilder to build the wsp file which just contains one web part. What do I do deploy the new wsp file. When I try using the same command above I get the error.
a solution with the same name "Demo.wsp" or id "blahblah" already exists in the solution store