NA Gazelle, weird error when you update a system

This is on the NA Gazelle at wustl.

You might need an admin account to trigger this:

1) Login and change your session to the Eye Care 2016 session.
2) Logout and login again to make sure you are not seeing a bug with the session switch issues.
3) Access the list of systems in that testing session.
4) Edit any system. On the system summary tab (system name, keyword), hit the save button. You do not need to change anything.
5) The log file then says:
2016-09-26 10:49:10,288 ERROR (smoore) [net.ihe.gazelle.tm.financial.action.FinancialManager] (ajp-/0.0.0.0:8209-14 /systems/system/systemsInSession.seam) No valid testing session provided.