I have a table that I have created (in models) using 

    db.define_table('myTable',
                    Field('start', type='datetime', requires=NE)
    )

I have some records in this table, in this format: '2015-12-31 00:00:00' (this 
is on id = 1)


I want to run a query that will add one hour to this time, for each row.


db(db.myTable.id == 1).update(start = db.myTable.start + timedelta(hours=1))


But when I execute the above query, it changes the start value to '2015-12-31 
00:00:01'. And if I run the same query again it changes it to '0000-00-00 
00:00:00'. What am I doing wrong here and how can I fix this?


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