User installed new licenses on vSRX, but he is getting this error: Warning "Ignoring the key for unknown feature id: 293".

There are a couple of public PRs describing this error:

A warning message is seen while installing a license key with an unknown feature (PR1766515)

https://prsearch.juniper.net/problemreport/PR1766515

Warning "Ignoring the key for unknown feature id: XXX" is generated when a valid license is installed into a device (PR1568788)

https://prsearch.juniper.net/problemreport/PR1568788

This user was able to fix this error by just deleting the license and reinstalling it again. He didn't need to upgrade.