[web2py] Current transaction aborted error when trying to save session in database

[Rohan]

web2py version: 1.98.2

I have two servers with shared database and I am trying to store session in 
database using 
    session.connect(request, response, db=db, migrate=False) 

but  session._try_store_in_db is throwing Internal Error from one of the 
servers but it works fine from second server.
Here is traceback

Traceback (most recent call last):
  File "/home/www-data/web2py/gluon/main.py", line 497, in 
wsgibase
    session._try_store_in_db(request, response)
  File "/home/www-data/web2py/gluon/globals.py", line 474, in 
_try_store_in_db
    record_id = table.insert(**dd)
  File "/home/www-data/web2py/gluon/dal.py", line 4786, in insert
    return self._db._adapter.insert(self,self._listify(fields))
  File "/home/www-data/web2py/gluon/dal.py", line 844, in insert
    raise e
InternalError: current transaction is aborted, commands ignored until end 
of transaction block

Any pointers will be appreciated
Regards