Exception raised by tbwiki software

Traceback (most recent call last):
  File "/usr/lib/cgi-bin/fuego-1.1.cgi", line 55, in 
    main(req)
  File "/home/ubuntu/work/tbwiki/cgi-bin/tbwiki_engine.py", line 2483, in main
    html = block_to_html(req, page_data)
  File "/home/ubuntu/work/tbwiki/cgi-bin/tbwiki_engine.py", line 1951, in block_to_html
    html += line_to_html(req.state, newline + '\n')
  File "/home/ubuntu/work/tbwiki/cgi-bin/tbwiki_engine.py", line 2016, in line_to_html
    html += call_processor(state.processor, "main", state.req, state.block_content)
  File "/home/ubuntu/work/tbwiki/cgi-bin/tbwiki_engine.py", line 1889, in call_processor
    return processor_func(req, content)
  File "/home/ubuntu/work/tbwiki-data/fuego-1.1/plugins/ProcessorTable.py", line 15, in main
    result = table.get_table(req, content)
  File "/home/ubuntu/work/tbwiki/cgi-bin/table.py", line 1739, in get_table
    tb = setup_conf_and_db(req, content)
  File "/home/ubuntu/work/tbwiki/cgi-bin/table.py", line 1690, in setup_conf_and_db
    req.page_name, conf)
  File "/home/ubuntu/work/tbwiki/cgi-bin/table.py", line 2690, in get_table_data
    tb.handler.read()
  File "/home/ubuntu/work/tbwiki/cgi-bin/table.py", line 687, in read
    db_from_tbwikidb_files(self.tb, self.data_dir, self.source_spec)
  File "/home/ubuntu/work/tbwiki/cgi-bin/table.py", line 2502, in db_from_tbwikidb_files
    convert_attrdb_to_full_tb(tb, attrdb)
  File "/home/ubuntu/work/tbwiki/cgi-bin/table.py", line 2433, in convert_attrdb_to_full_tb
    field_list.remove('record_id')
ValueError: list.remove(x): x not in list