multisession confusion

[AustinGQ]

This application uses an application generated sessionID to keep every session unique. I am able to save that ID through HttpSession for every simulated user. After 3 layers from login page to the detail page, where I have multiple tasks defined, the only working session is the last session that got created. I can tell from debugging the each session has unique sessionID, but it seems that only the last created session is "alive". When the other sessions try to make any requestion with their session, I get session application error which means I try to make request with wrong session information.

the basic layout is like this, is this because sessions are handled by the application?

class layer3(taskset)
def on_start
def task1
def task2

class layer2(taskset)
def on_start
task{layer3:1}

class layer1(taskset)
..self.locust.snid = app_snid.
task{layer2:1}