Some Content has matching title ids

When going through some demos I found out that some demos have the same title ids all being NPUA80191.

Game affected
Flock! Demo
DiRT 2 Demo
MotorStorm: Pacific Rift Demo
NARUTO Ultimate Ninja Storm Demo
Red Faction Guerilla Demo
Valkyria Chronicles Demo
F.E.A.R. 2: Project Origin Demo
VANQUISH OFFICIAL DEMO
TerRover Demo

Sources: https://www.serialstation.com/titles/NPUA/80191