Can't change mark of old bolt pistol

Warhammer 40,000: Darktide Bugs
1

Issue Type (Required):

Weapons

Issue Description (Required):

I am unable to change the weapon mark of a bolt pistol from before the update unlike bolt pistols obtained after the update

Steps to Reproduce (Required):

1.I attempt to change the weapon mark in the loadout screen

[PC] Do You Use Mods? (Optional):

No, I don’t use mods

Reproduction Rate (Required):

Constant (100%)

Platform (Required):

PC - Steam

2

There’s no option? My helbore was doing the same but I had to equip a different weapon, let it load in psykhanium and then re equip it to work.