Im trying Step 3 on this tutorial but I get a error If I type ./easyrsa import-req /tmp/server.req server it says

Note: using Easy-RSA configuration from: ./vars

Easy-RSA error:

Unable to import the request as the destination file already exists.
Please choose a different name for your imported request file.
Existing file at: /home/sammy/EasyRSA-3.0.4/pki/reqs/server.req