Yes upgrade the DA.
Current is 2019, so download from this one.
https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solut...
Click "install DA" point to the file and then the deployment agent will be upgraded.
Can be done anytime.
It dosn´t look like you have any packages to download.
Maybe that fixes itself after the DA is updated.
But then you would have new packages to download including major upgrade.
Select the version you want to go to and download it.
Then mark the file and select verify.
After that you can take your snapshot/backup.
Then you can do the upgrade 🙂
Keep in mind that you mgmt station need to support R80.40 GW aswell.
Regards,
Magnus
https://www.youtube.com/c/MagnusHolmberg-NetSec