Internal Server Error when deleting a comment

[adrmateu@…]

Deleting a comment provokes the following error:

Python Traceback
Most recent call last:

    File "c:/users/ammall~1/appdata/local/temp/easy_install-4unthi/Trac-1.0.5-py2.7-win32.egg.tmp/trac/web/main.py", line 513, in _dispatch_request
    File "c:/users/ammall~1/appdata/local/temp/easy_install-4unthi/Trac-1.0.5-py2.7-win32.egg.tmp/trac/web/main.py", line 222, in dispatch
    File "c:/users/ammall~1/appdata/local/temp/easy_install-4unthi/Trac-1.0.5-py2.7-win32.egg.tmp/tracopt/ticket/deleter.py", line 146, in process_request
    File "c:/users/ammall~1/appdata/local/temp/easy_install-4unthi/Trac-1.0.5-py2.7-win32.egg.tmp/trac/ticket/model.py", line 527, in delete_change

System Information:

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0
Trac    1.0.5
Docutils    0.9.1
Genshi  0.7 (without speedups)
mod_wsgi    3.3 (WSGIProcessGroup WSGIApplicationGroup %{GLOBAL})
Pygments    1.5
pysqlite    2.6.0
Python  2.7.3 (default, Apr 10 2012, 23:31:26) [MSC v.1500 32 bit (Intel)]
pytz    2011c
setuptools  1.1.6
SQLite  3.8.9
Subversion  1.7.3 (r1242825)
jQuery  1.7.2
jQuery UI   1.8.21
jQuery Timepicker   1.0.1
Enabled Plugins:
timingandestimationplugin   1.4.7b  c:\python27\lib\site-packages\timingandestimationplugin-1.4.7b-py2.7.egg
trac-jsgantt    0.11    c:\python27\lib\site-packages\trac_jsgantt-0.11-py2.7.egg
tracmastertickets   3.0.4   c:\python27\lib\site-packages\tracmastertickets-3.0.4-py2.7.egg
tracsubticketsplugin    0.2.0.dev-20150225  c:\work\trac\projects\sweng\plugins\tracsubticketsplugin-0.2.0.dev_20150225-py2.7.egg

According to ​trac:#12074 is is caused by the following code.

[Russ Tyndall]

14863 Sorry I missed this, it should be resolved now hopefully. 1.4.8(b)