[web2py] error on crud.update delete

[selecta]

ERROR:web2py:Traceback (most recent call last):
  File "/home/select/Dev/web2py/gluon/restricted.py", line 181, in
restricted
    exec ccode in environment
  File "/home/select/Dev/web2py/applications/pyMantis/controllers/
plugin_whishlist.py", line 118, in <module>
  File "/home/select/Dev/web2py/gluon/globals.py", line 133, in
<lambda>
    self._caller = lambda f: f()
  File "/home/select/Dev/web2py/gluon/tools.py", line 2335, in f
    return action(*a, **b)
  File "/home/select/Dev/web2py/applications/pyMantis/controllers/
plugin_whishlist.py", line 68, in edit
    if form.accepts(request.vars, session):
  File "/home/select/Dev/web2py/gluon/sqlhtml.py", line 1200, in
accepts
    self.table._db(self.table.id == self.record.id).update(**fields)
  File "/home/select/Dev/web2py/gluon/dal.py", line 5173, in update
    fields = self.db[tablename]._listify(update_fields,update=True)
  File "/home/select/Dev/web2py/gluon/dal.py", line 4464, in _listify
    raise SyntaxError, 'Field %s does not belong to the table' % name
SyntaxError: Field delete_this_record does not belong to the table

is this somehow my fault? not sure how to debug