Mod Conflict

[shootaman777]

I have 2 separate maxed Hell's Chamber mods, and Warframe will not allow me to use one on my Hek and one on my Sweeper Prime at the same time, regardless of which one I attempt to use on which weapon. Is this supposed to happen?

[6KIRA9]

it's actually not supposed to happen, make sure you try with both on your sweeper prime to see if you were trying with the same (try the first, if it gives conflict try the other one)

 

if that don't work contact the support they are the only who can help, unless someone gives a workaround for this bug.

[Darzk]

Unequip both mods, then go back in and equip them. It's an old arsenal bug that's been persistent forever, it forgets which mod is equipped on which weapon. If this still doesn't work, you need to go in and unequip Hell's Chamber from every shotgun you have and then it should work :S

[Ryusuta]

Is one of them equipped to your Sentinel's weapon? That could be the problem.

[FierceRadiance]

This bug is why I have a couple of different versions of several of the older mods at each upgrade level, because I used to run into it a lot when there were only a few weapons to put mods in.