When updating the system it appears Lineageos 0.17 instead of e/ 0.17. What it does mean?
Regain your privacy! Adopt /e/ the unGoogled mobile OS and online services
/e/OS is a fork of LineageOS. Did this appear after flashing a fresh /e/ROM on your OP6 or after doing an over the air (OTA) update on an /e/ROM already installed on your OP6? A couple of links that could be of help 
. If this is a bug in the /e/OS update it should be reported.
I had 0.13 in my OP 6 and update in the phone to 0.17. So it is in the updater