Problems upgrading from vtiger 5.2.1

[joebordes]

Ok, that explains it. The session name is all numbers and that is not accepted.
I have just added a change that should fix your problem:

https://github.com/tsolucio/corebos/commit/00e665cc257d6b94e3e0ba8527cf294678d1e2f9

update your code and let me know how it goes.