[Koha] Software error

[Sahadeo Taware]

I am updating koha software from 17.11 to 18.

it gives the error
Software error:

DBIx::Class::Storage::DBI::_dbh_execute(): Table
'koha_library.library_groups' doesn't exist at
/usr/share/koha/lib/Koha/Objects.pm line 129

For help, please send mail to the webmaster ([no address given]), giving
this error message and the time and date of the error.


-- 
Sahadeo D. Taware
Librarian, M.L.I.Sc., NET
Thakur College of Science and Commerce
Thakur Village, Kandivli(E), Mumbai 400101
Mob. No 9324912816
Office 28870627 Extn. 126