PDOException Object
(
    [message:protected] => SQLSTATE[42000]: Syntax error or access violation: 1091 Can't DROP 'parent_id'; check that column/key exists
    [string:Exception:private] => 
    [code:protected] => 42000
    [file:protected] => /www/sites/www.proshopsllc.com/files/html/lib/Zend/Db/Statement/Pdo.php
    [line:protected] => 228
    [trace:Exception:private] => Array
        (
            [0] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Zend/Db/Statement/Pdo.php
                    [line] => 228
                    [function] => execute
                    [class] => PDOStatement
                    [type] => ->
                    [args] => Array
                        (
                            [0] => Array
                                (
                                )

                        )

                )

            [1] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Varien/Db/Statement/Pdo/Mysql.php
                    [line] => 110
                    [function] => _execute
                    [class] => Zend_Db_Statement_Pdo
                    [type] => ->
                    [args] => Array
                        (
                            [0] => Array
                                (
                                )

                        )

                )

            [2] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/core/Zend/Db/Statement.php
                    [line] => 291
                    [function] => _execute
                    [class] => Varien_Db_Statement_Pdo_Mysql
                    [type] => ->
                    [args] => Array
                        (
                            [0] => Array
                                (
                                )

                        )

                )

            [3] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Zend/Db/Adapter/Abstract.php
                    [line] => 479
                    [function] => execute
                    [class] => Zend_Db_Statement
                    [type] => ->
                    [args] => Array
                        (
                            [0] => Array
                                (
                                )

                        )

                )

            [4] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Zend/Db/Adapter/Pdo/Abstract.php
                    [line] => 238
                    [function] => query
                    [class] => Zend_Db_Adapter_Abstract
                    [type] => ->
                    [args] => Array
                        (
                            [0] => ALTER TABLE `mage_m2epro_amazon_dictionary_specific` DROP KEY `parent_id`
                            [1] => Array
                                (
                                )

                        )

                )

            [5] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Varien/Db/Adapter/Pdo/Mysql.php
                    [line] => 428
                    [function] => query
                    [class] => Zend_Db_Adapter_Pdo_Abstract
                    [type] => ->
                    [args] => Array
                        (
                            [0] => ALTER TABLE `mage_m2epro_amazon_dictionary_specific` DROP KEY `parent_id`
                            [1] => Array
                                (
                                )

                        )

                )

            [6] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Varien/Db/Adapter/Pdo/Mysql.php
                    [line] => 347
                    [function] => query
                    [class] => Varien_Db_Adapter_Pdo_Mysql
                    [type] => ->
                    [args] => Array
                        (
                            [0] => ALTER TABLE `mage_m2epro_amazon_dictionary_specific` DROP KEY `parent_id`
                        )

                )

            [7] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Varien/Db/Adapter/Pdo/Mysql.php
                    [line] => 2686
                    [function] => raw_query
                    [class] => Varien_Db_Adapter_Pdo_Mysql
                    [type] => ->
                    [args] => Array
                        (
                            [0] => ALTER TABLE `mage_m2epro_amazon_dictionary_specific` DROP KEY `parent_id`
                        )

                )

            [8] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/lib/Varien/Db/Adapter/Pdo/Mysql.php
                    [line] => 727
                    [function] => dropIndex
                    [class] => Varien_Db_Adapter_Pdo_Mysql
                    [type] => ->
                    [args] => Array
                        (
                            [0] => mage_m2epro_amazon_dictionary_specific
                            [1] => parent_id
                            [2] => 
                        )

                )

            [9] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/community/Ess/M2ePro/sql/M2ePro_setup/mysql4-upgrade-6.1.4-6.1.5.php
                    [line] => 296
                    [function] => dropKey
                    [class] => Varien_Db_Adapter_Pdo_Mysql
                    [type] => ->
                    [args] => Array
                        (
                            [0] => mage_m2epro_amazon_dictionary_specific
                            [1] => parent_id
                        )

                )

            [10] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/core/Mage/Core/Model/Resource/Setup.php
                    [line] => 624
                    [args] => Array
                        (
                            [0] => /www/sites/www.proshopsllc.com/files/html/app/code/community/Ess/M2ePro/sql/M2ePro_setup/mysql4-upgrade-6.1.4-6.1.5.php
                        )

                    [function] => include
                )

            [11] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/core/Mage/Core/Model/Resource/Setup.php
                    [line] => 437
                    [function] => _modifyResourceDb
                    [class] => Mage_Core_Model_Resource_Setup
                    [type] => ->
                    [args] => Array
                        (
                            [0] => upgrade
                            [1] => 6.1.2
                            [2] => 6.1.6
                        )

                )

            [12] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/core/Mage/Core/Model/Resource/Setup.php
                    [line] => 320
                    [function] => _upgradeResourceDb
                    [class] => Mage_Core_Model_Resource_Setup
                    [type] => ->
                    [args] => Array
                        (
                            [0] => 6.1.2
                            [1] => 6.1.6
                        )

                )

            [13] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/core/Mage/Core/Model/Resource/Setup.php
                    [line] => 235
                    [function] => applyUpdates
                    [class] => Mage_Core_Model_Resource_Setup
                    [type] => ->
                    [args] => Array
                        (
                        )

                )

            [14] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/core/Mage/Core/Model/App.php
                    [line] => 417
                    [function] => applyAllUpdates
                    [class] => Mage_Core_Model_Resource_Setup
                    [type] => ::
                    [args] => Array
                        (
                        )

                )

            [15] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/code/core/Mage/Core/Model/App.php
                    [line] => 343
                    [function] => _initModules
                    [class] => Mage_Core_Model_App
                    [type] => ->
                    [args] => Array
                        (
                        )

                )

            [16] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/app/Mage.php
                    [line] => 684
                    [function] => run
                    [class] => Mage_Core_Model_App
                    [type] => ->
                    [args] => Array
                        (
                            [0] => Array
                                (
                                    [scope_code] => base
                                    [scope_type] => website
                                    [options] => Array
                                        (
                                        )

                                )

                        )

                )

            [17] => Array
                (
                    [file] => /www/sites/www.proshopsllc.com/files/html/index.php
                    [line] => 106
                    [function] => run
                    [class] => Mage
                    [type] => ::
                    [args] => Array
                        (
                            [0] => base
                            [1] => website
                        )

                )

        )

    [previous:Exception:private] => 
    [errorInfo] => Array
        (
            [0] => 42000
            [1] => 1091
            [2] => Can't DROP 'parent_id'; check that column/key exists
        )

)