Mistakes while upgrade from Joomla! 2.5.28 to 3.4.1 - Joomla! Forum - community, help and support

hello everybody!

i'm trying upgrade joomla! 2.5.20 joomla! 3.4.1 means of following instruction.
first of made upgrade joomla! 2.5.28. made update/deletion main components, not all.
at stage of process there instruction open joomla update component in components menu item @ backend, there no such component.
ok, i'm going @ control panel , clicking @ "joomla date" link. after page has been loaded see

error loading component: com_joomlaupdate, 1

message.
ok, i'm trying go further , click @ options button @ top right conner. i'm choosing "short term support" option update server, hit save , close , see error:

fatal error: call member function filter() on non-object in c:\xampp\htdocs\agm\libraries\joomla\application\component\modelform.php on line 261
call stack
# time memory function location
1 0.0010 160352 {main}( ) ..\index.php:0
2 0.1250 3642088 jadministrator->dispatch( ) ..\index.php:46
3 0.1310 3855048 jcomponenthelper::rendercomponent( ) ..\application.php:153
4 0.1390 3899584 jcomponenthelper::executecomponent( ) ..\helper.php:348
5 0.1400 3919136 require_once( 'c:\xampp\htdocs\agm\administrator\components\com_config\config.php' ) ..\helper.php:380
6 0.1470 4127952 jcontroller->execute( ) ..\config.php:18
7 0.1470 4128264 configcontrollercomponent->save( ) ..\controller.php:761
8 0.1640 4722552 jmodelform->validate( ) ..\component.php:60

ok, i'm making last attempt install joomla! 3.4.1 manualy "tmp" folder
after hit install see fatal error:

call member function get() on non-object in administrator\components\com_installer\controller.php on line 37

i've openned admin panel , saw bunch of such errors:

error
jinstaller: :install: error sql db function failed error number 1062
duplicate entry '448' key 'primary' sql=insert `ytgb1_extensions` (`extension_id`, `name`, `type`, `element`, `folder`, `client_id`, `enabled`, `access`, `protected`, `manifest_cache`, `params`, `custom_data`, `system_data`, `checked_out`, `checked_out_time`, `ordering`, `state`) values (30, 'com_contenthistory', 'component', 'com_contenthistory', '', 1, 1, 1, 0, '{"name":"com_contenthistory","type":"component","creationdate":"may 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.\\n\\t","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_contenthistory_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (31, 'com_ajax', 'component', 'com_ajax', '', 1, 1, 1, 0, '{"name":"com_ajax","type":"component","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_ajax_desc","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (32, 'com_postinstall', 'component', 'com_postinstall', '', 1, 1, 1, 1, '', '', '', '', 0, '0000-00-00 00:00:00', 0, 0), (105, 'fof', 'library', 'fof', '', 0, 1, 1, 1, '{"legacy":false,"name":"fof","type":"library","creationdate":"2013-10-08","author":"nicholas k. dionysopoulos \/ akeeba ltd","copyright":"(c)2011-2013 nicholas k. dionysopoulos","authoremail":"nicholas@akeebabackup.com","authorurl":"https:\/\/www.akeebabackup.com","version":"2.1.rc4","description":"framework-on-framework (fof) - rapid component development framework joomla!","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (448, 'plg_twofactorauth_totp', 'plugin', 'totp', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_totp","type":"plugin","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_totp_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (449, 'plg_authentication_cookie', 'plugin', 'cookie', 'authentication', 0, 1, 1, 0, '{"name":"plg_authentication_cookie","type":"plugin","creationdate":"july 2013","author":"joomla! project","copyright":"copyright (c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.0.0","description":"plg_auth_cookie_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (450, 'plg_twofactorauth_yubikey', 'plugin', 'yubikey', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_yubikey","type":"plugin","creationdate":"se[ptember 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_yubikey_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0);
sql =

insert `#__extensions` (`extension_id`, `name`, `type`, `element`, `folder`, `client_id`, `enabled`, `access`, `protected`, `manifest_cache`, `params`, `custom_data`, `system_data`, `checked_out`, `checked_out_time`, `ordering`, `state`) values
(30, 'com_contenthistory', 'component', 'com_contenthistory', '', 1, 1, 1, 0, '{"name":"com_contenthistory","type":"component","creationdate":"may 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.\\n\\t","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_contenthistory_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(31, 'com_ajax', 'component', 'com_ajax', '', 1, 1, 1, 0, '{"name":"com_ajax","type":"component","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_ajax_desc","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(32, 'com_postinstall', 'component', 'com_postinstall', '', 1, 1, 1, 1, '', '', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(105, 'fof', 'library', 'fof', '', 0, 1, 1, 1, '{"legacy":false,"name":"fof","type":"library","creationdate":"2013-10-08","author":"nicholas k. dionysopoulos \/ akeeba ltd","copyright":"(c)2011-2013 nicholas k. dionysopoulos","authoremail":"nicholas@akeebabackup.com","authorurl":"https:\/\/www.akeebabackup.com","version":"2.1.rc4","description":"framework-on-framework (fof) - rapid component development framework joomla!","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(448, 'plg_twofactorauth_totp', 'plugin', 'totp', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_totp","type":"plugin","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_totp_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(449, 'plg_authentication_cookie', 'plugin', 'cookie', 'authentication', 0, 1, 1, 0, '{"name":"plg_authentication_cookie","type":"plugin","creationdate":"july 2013","author":"joomla! project","copyright":"copyright (c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.0.0","description":"plg_auth_cookie_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(450, 'plg_twofactorauth_yubikey', 'plugin', 'yubikey', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_yubikey","type":"plugin","creationdate":"se[ptember 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_yubikey_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0);
files update: sql error file db function failed error number 1062
duplicate entry '448' key 'primary' sql=insert `ytgb1_extensions` (`extension_id`, `name`, `type`, `element`, `folder`, `client_id`, `enabled`, `access`, `protected`, `manifest_cache`, `params`, `custom_data`, `system_data`, `checked_out`, `checked_out_time`, `ordering`, `state`) values (30, 'com_contenthistory', 'component', 'com_contenthistory', '', 1, 1, 1, 0, '{"name":"com_contenthistory","type":"component","creationdate":"may 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.\\n\\t","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_contenthistory_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (31, 'com_ajax', 'component', 'com_ajax', '', 1, 1, 1, 0, '{"name":"com_ajax","type":"component","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_ajax_desc","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (32, 'com_postinstall', 'component', 'com_postinstall', '', 1, 1, 1, 1, '', '', '', '', 0, '0000-00-00 00:00:00', 0, 0), (105, 'fof', 'library', 'fof', '', 0, 1, 1, 1, '{"legacy":false,"name":"fof","type":"library","creationdate":"2013-10-08","author":"nicholas k. dionysopoulos \/ akeeba ltd","copyright":"(c)2011-2013 nicholas k. dionysopoulos","authoremail":"nicholas@akeebabackup.com","authorurl":"https:\/\/www.akeebabackup.com","version":"2.1.rc4","description":"framework-on-framework (fof) - rapid component development framework joomla!","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (448, 'plg_twofactorauth_totp', 'plugin', 'totp', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_totp","type":"plugin","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_totp_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (449, 'plg_authentication_cookie', 'plugin', 'cookie', 'authentication', 0, 1, 1, 0, '{"name":"plg_authentication_cookie","type":"plugin","creationdate":"july 2013","author":"joomla! project","copyright":"copyright (c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.0.0","description":"plg_auth_cookie_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0), (450, 'plg_twofactorauth_yubikey', 'plugin', 'yubikey', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_yubikey","type":"plugin","creationdate":"se[ptember 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_yubikey_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0);
sql =

insert `#__extensions` (`extension_id`, `name`, `type`, `element`, `folder`, `client_id`, `enabled`, `access`, `protected`, `manifest_cache`, `params`, `custom_data`, `system_data`, `checked_out`, `checked_out_time`, `ordering`, `state`) values
(30, 'com_contenthistory', 'component', 'com_contenthistory', '', 1, 1, 1, 0, '{"name":"com_contenthistory","type":"component","creationdate":"may 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.\\n\\t","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_contenthistory_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(31, 'com_ajax', 'component', 'com_ajax', '', 1, 1, 1, 0, '{"name":"com_ajax","type":"component","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"com_ajax_desc","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(32, 'com_postinstall', 'component', 'com_postinstall', '', 1, 1, 1, 1, '', '', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(105, 'fof', 'library', 'fof', '', 0, 1, 1, 1, '{"legacy":false,"name":"fof","type":"library","creationdate":"2013-10-08","author":"nicholas k. dionysopoulos \/ akeeba ltd","copyright":"(c)2011-2013 nicholas k. dionysopoulos","authoremail":"nicholas@akeebabackup.com","authorurl":"https:\/\/www.akeebabackup.com","version":"2.1.rc4","description":"framework-on-framework (fof) - rapid component development framework joomla!","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(448, 'plg_twofactorauth_totp', 'plugin', 'totp', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_totp","type":"plugin","creationdate":"august 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_totp_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(449, 'plg_authentication_cookie', 'plugin', 'cookie', 'authentication', 0, 1, 1, 0, '{"name":"plg_authentication_cookie","type":"plugin","creationdate":"july 2013","author":"joomla! project","copyright":"copyright (c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.0.0","description":"plg_auth_cookie_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0),
(450, 'plg_twofactorauth_yubikey', 'plugin', 'yubikey', 'twofactorauth', 0, 0, 1, 0, '{"name":"plg_twofactorauth_yubikey","type":"plugin","creationdate":"se[ptember 2013","author":"joomla! project","copyright":"(c) 2005 - 2015 open source matters. rights reserved.","authoremail":"admin@joomla.org","authorurl":"www.joomla.org","version":"3.2.0","description":"plg_twofactorauth_yubikey_xml_description","group":""}', '{}', '', '', 0, '0000-00-00 00:00:00', 0, 0);
table 'agm.ytgb1_postinstall_messages' doesn't exist sql=show full columns `ytgb1_postinstall_messages`

also admin panel looking j3 seems joomla broken.
i think made mistake while trying upgrade although there no joomla update component
presented in components link.
please show me mistakes or show me way can working joomla! 3.4.1 site

you use 3rd party migration/upgrade component such jupgradepro. if search "joomla migration" in extensions directory there's few choose from. idea restore site backup , start on since of these components detect proper before going forward.

i make sure see proper joomla update in components list. there issues showing , other reports on forum have fixes that. update.