[Koha] problems when make uprgade koha3.6 to 3.8.1

[kouider bounama]

when iam Web installer › Step 3 
Updating database structure

i see this errors what i do
Update errors :

    [Wed May 23 01:49:46 2012] updatedatabase.pl: DBD::mysql::db do failed:
Duplicate column name 'patronreason' at
/usr/share/koha/intranet/cgi-bin/installer/data/mysql/updatedatabase.pl line
4586.
    [Wed May 23 01:49:47 2012] updatedatabase.pl: DBD::mysql::db do failed:
Duplicate entry '545' for key 'PRIMARY' at
/usr/share/koha/intranet/cgi-bin/installer/data/mysql/updatedatabase.pl line
4618.
    [Wed May 23 01:49:47 2012] updatedatabase.pl: DBD::mysql::db do failed:
Duplicate entry 'AllowItemsOnHoldCheckout' for key 'PRIMARY' at
/usr/share/koha/intranet/cgi-bin/installer/data/mysql/updatedatabase.pl line
4672.


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