Mod_python error: "PythonHandler main"

Traceback (most recent call last):

  File "/usr/lib64/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/gnshare/gn/web/webqtl/main.py", line 91, in handler
    page = ShowProbeInfoPage.ShowProbeInfoPage(fd)

  File "/gnshare/gn/web/webqtl/showTrait/ShowProbeInfoPage.py", line 122, in __init__
    _f1, _f12, _mat, _pat = webqtlUtil.ParInfo[fd.RISet]

KeyError: 'GTEx_v5'