@josepe You can check the Greenbone Security Manager. (login as guest)
It´s always good to compare the feed version of the livedemo with your own instance.
The GVM_DATA there is 139 days old, too.
Update your scan engine, with that EoL engine there is the risk that not all NVTs could be executed properly and you might miss critical vulnerabilities.
I just checked the Security Manager, like @Eric suggested (Great Idea!), and my info matches up. I noticed a change in syntax (for Kali Linux). In order to update the different “feeds”, the command is sudo -u _gvm greenbone-certdata-sync --type CERT/SCAP/GVMD_DATA. Yes, you can also run sudo -u _gvm greenbone-nvt-sync, but it does not seem to have the same effect as the first command.
Sorry, I left something out, if you want to Auto delete old reports, you can do that when you start a Scan.