MasterTicket is not usable for some reason

[solidius4747@…]

Here is the stack trace:

  File "build/bdist.linux-i686/egg/trac/web/api.py", line 440, in send_error
    data, 'text/html')
  File "build/bdist.linux-i686/egg/trac/web/chrome.py", line 868, in render_template
    stream.render(method, doctype=doctype, out=buffer)
  File "/usr/lib/pymodules/python2.6/genshi/core.py", line 183, in render
    return encode(generator, method=method, encoding=encoding, out=out)
  File "/usr/lib/pymodules/python2.6/genshi/output.py", line 58, in encode
    for chunk in iterator:
  File "/usr/lib/pymodules/python2.6/genshi/output.py", line 339, in __call__
    for kind, data, pos in stream:
  File "/usr/lib/pymodules/python2.6/genshi/output.py", line 826, in __call__
    for kind, data, pos in stream:
  File "/usr/lib/pymodules/python2.6/genshi/output.py", line 670, in __call__
    for kind, data, pos in stream:
  File "/usr/lib/pymodules/python2.6/genshi/output.py", line 771, in __call__
    for kind, data, pos in chain(stream, [(None, None, None)]):
  File "/usr/lib/pymodules/python2.6/genshi/output.py", line 586, in __call__
    for ev in stream:
  File "/usr/lib/pymodules/python2.6/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "build/bdist.linux-i686/egg/trac/web/chrome.py", line 981, in _strip_accesskeys
    for kind, data, pos in stream:
  File "/usr/lib/pymodules/python2.6/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "build/bdist.linux-i686/egg/trac/web/chrome.py", line 970, in _generate
    for kind, data, pos in stream:
  File "/usr/lib/pymodules/python2.6/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/template/base.py", line 605, in _include
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "/usr/lib/pymodules/python2.6/genshi/template/markup.py", line 378, in _match
    ctxt, start=idx + 1, **vars):
  File "/usr/lib/pymodules/python2.6/genshi/template/markup.py", line 327, in _match
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
  File "/usr/lib/pymodules/python2.6/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/path.py", line 588, in _generate
    subevent = next()
  File "/usr/lib/pymodules/python2.6/genshi/template/base.py", line 605, in _include
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/template/markup.py", line 316, in _strip
    event = next()
  File "/usr/lib/pymodules/python2.6/genshi/template/base.py", line 545, in _flatten
    for kind, data, pos in stream:
  File "/usr/lib/pymodules/python2.6/genshi/core.py", line 288, in _ensure
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/path.py", line 588, in _generate
    subevent = next()
  File "/usr/lib/pymodules/python2.6/genshi/template/base.py", line 605, in _include
    for event in stream:
  File "/usr/lib/pymodules/python2.6/genshi/template/markup.py", line 316, in _strip
    event = next()
  File "/usr/lib/pymodules/python2.6/genshi/template/base.py", line 565, in _flatten
    result = _eval_expr(data, ctxt, vars)
  File "/usr/lib/pymodules/python2.6/genshi/template/base.py", line 277, in _eval_expr
    retval = expr.evaluate(ctxt)
  File "/usr/lib/pymodules/python2.6/genshi/template/eval.py", line 178, in evaluate
    return eval(self.code, _globals, {'__data__': data})
  File "/root/.python-eggs/Trac-0.12.2-py2.6.egg-tmp/trac/templates/error.html", line 165, in <Expression u'shorten_line(repr(value))'>
    <td><code>${shorten_line(repr(value))}</code></td>
  File "build/bdist.linux-i686/egg/mastertickets/model.py", line 118, in __repr__
    (self.tkt.id, l(getattr(self, 'blocking', [])), l(getattr(self, 'blocked_by', [])))
AttributeError: 'TicketLinks' object has no attribute 'tkt'