Thank you Merovejec for the reply. I looked in the forums before posting and i was sure all 4 must have it, happy to be wrong.

Hi, it's been a while since i started to look for people who need to complete this quest too. We should be necessarily 4 and everyone must have the quest. If there is anyone interested PM in game (Reiko Tano) or leave a message here and I'll contact you back.

I have the same issue! I hope they'll fix it soon. I am stucked with Taris bonus series too btw..it sucks.