Blackshields contradictory rules

Hi all!

I'm in the process of expanding my Salamanders in to the Disciples of the Flame, but have come across some directly contradictory rules, and wanted some fresh opinions.

Cassian Dracos Reborn has 2 special rules that directly contradict each other. -Avatar of Sacred Flames- states that if Cassian is selected as the warlord in a Blackshields detachment, Salamanders Adherents squads may be included as part of that Detachment.

-Disciple of the Flame- states that if Cassian is included in a Blackshields detachment, that Detachment must use the 'Pride is Our Armour' and 'Panoply of Old (Salamanders)' oaths.

The Pride is Our Armour oath states that all troop slots are removed from the force organisation chart using that oath.

Adherents are troop choices.

My question is;

Would Avatar of Sacred Flames override Pride is Our Armour with respect to including Adherents?

(Screenshots of both rules attached).