Quoting vishal kataria:
> Hi All
> I am facing error on my bugzilla(2.19.2). Error is given below
> Please stand by ...
> Software error:
> DBD::mysql::st execute failed: Unknown column 'bugs.bug_id' in 'on

Well, THAT's not good. Are you able to view any bugs by number? Or
search for bugs using other criteria?

First glance suggests that your bugs table is corrupted or modified.
Try to view the bugs table in the database. Make sure you specify the
database name in localconfig, even if you know what it is you should
still verify its correct.