商品マスタでCSVダウンロードをするとログイン画面に戻りエラーとなります。
ログを見ると下記のようになっています。

恐れ入りますが、原因と対処方法をDB素人にも分かるようにご教示いただけますと幸いです。

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Fatal error(E_USER_ERROR): DB処理でエラーが発生しました。
SQL: [SELECT name FROM ( SELECT dtb_products.*, dtb_products_class.product_class_id, dtb_products_class.product_type_id, dtb_products_class.product_code, dtb_products_class.stock, dtb_products_class.stock_unlimited, dtb_products_class.sale_limit, dtb_products_class.price01, dtb_products_class.price02, dtb_products_class.deliv_fee, dtb_products_class.point_rate, dtb_products_class.down_filename, dtb_products_class.down_realfilename, dtb_products_class.classcategory_id1 AS classcategory_id, /* 削除 */ dtb_products_class.classcategory_id1, dtb_products_class.classcategory_id2 AS parent_classcategory_id, /* 削除 */ dtb_products_class.classcategory_id2, Tcc1.class_id as class_id, Tcc1.name as classcategory_name, Tcc2.class_id as parent_class_id, Tcc2.name as parent_classcategory_name FROM dtb_products LEFT JOIN dtb_products_class ON dtb_products.product_id = dtb_products_class.product_id ,dtb_products.sub_title7 ,dtb_products.sub_comment7 ,dtb_products.sub_image7 ,dtb_products.sub_large_image7 ,dtb_products.sub_title8 ,dtb_products.sub_comment8 ,dtb_products.sub_image8 ,dtb_products.sub_large_image8 ,dtb_products.sub_title9 ,dtb_products.sub_comment9 ,dtb_products.sub_image9 ,dtb_products.sub_large_image9 ,dtb_products.sub_title10 ,dtb_products.sub_comment10 ,dtb_products.sub_image10 ,dtb_products.sub_large_image10 LEFT JOIN dtb_classcategory as Tcc1 ON dtb_products_class.classcategory_id1 = Tcc1.classcategory_id LEFT JOIN dtb_classcategory as Tcc2 ON dtb_products_class.classcategory_id2 = Tcc2.classcategory_id WHERE dtb_products_class.del_flg = 0 ) as prdcls WHERE del_flg = 0 ORDER BY update_date DESC ]
MDB2 Error: insufficient permissions
_doQuery: [Error message: Could not execute statement]
[Last executed query: PREPARE mdb2_statement_mysql_438fcd1270c742b519a287726c1c698dca27999731 FROM 'SELECT name FROM ( SELECT dtb_products.*, dtb_products_class.product_class_id, dtb_products_class.product_type_id, dtb_products_class.product_code, dtb_products_class.stock, dtb_products_class.stock_unlimited, dtb_products_class.sale_limit, dtb_products_class.price01, dtb_products_class.price02, dtb_products_class.deliv_fee, dtb_products_class.point_rate, dtb_products_class.down_filename, dtb_products_class.down_realfilename, dtb_products_class.classcategory_id1 AS classcategory_id, /* 削除 */ dtb_products_class.classcategory_id1, dtb_products_class.classcategory_id2 AS parent_classcategory_id, /* 削除 */ dtb_products_class.classcategory_id2, Tcc1.class_id as class_id, Tcc1.name as classcategory_name, Tcc2.class_id as parent_class_id, Tcc2.name as parent_classcategory_name FROM dtb_products LEFT JOIN dtb_products_class ON dtb_products.product_id = dtb_products_class.product_id ,dtb_products.sub_title7 ,dtb_products.sub_comment7 ,dtb_products.sub_image7 ,dtb_products.sub_large_image7 ,dtb_products.sub_title8 ,dtb_products.sub_comment8 ,dtb_products.sub_image8 ,dtb_products.sub_large_image8 ,dtb_products.sub_title9 ,dtb_products.sub_comment9 ,dtb_products.sub_image9 ,dtb_products.sub_large_image9 ,dtb_products.sub_title10 ,dtb_products.sub_comment10 ,dtb_products.sub_image10 ,dtb_products.sub_large_image10 LEFT JOIN dtb_classcategory as Tcc1 ON dtb_products_class.classcategory_id1 = Tcc1.classcategory_id LEFT JOIN dtb_classcategory as Tcc2 ON dtb_products_class.classcategory_id2 = Tcc2.classcategory_id WHERE dtb_products_class.del_flg = 0 ) as prdcls WHERE del_flg = 0 ORDER BY update_date DESC ']
[Native code: 1142]
[Native message: SELECT command denied to user 'petshopgarage'@'182.48.49.25' for table 'sub_title7']
on [/home/petshopgarage/www/poponeko/data/class/SC_Query.php(1007)] from 153.169.116.95
login_id = pxiee(0)[4f8c184580bcf389b1910025480811f7]
/home/*****/www/poponeko/admin/products/index.php(34): LC_Page_Admin_Products_Ex->process
/home/*****/www/poponeko/data/class_extends/page_extends/admin/products/LC_Page_Admin_Products_Ex.php(56): LC_Page_Admin_Products->process
/home/*****/www/poponeko/data/class/pages/admin/products/LC_Page_Admin_Products.php(81): LC_Page_Admin_Products->action
/home/*****/www/poponeko/data/class/pages/admin/products/LC_Page_Admin_Products.php(142): SC_Helper_CSV->sfDownloadCsv
/home/*****/www/poponeko/data/class/helper/SC_Helper_CSV.php(103): SC_Helper_CSV->sfDownloadCsvFromSql
/home/*****/www/poponeko/data/class/helper/SC_Helper_CSV.php(237): SC_Query->doCallbackAll
/home/*****/www/poponeko/data/class/SC_Query.php(247): SC_Query->prepare
/home/*****/www/poponeko/data/class/SC_Query.php(948): SC_Query->error
/home/*****/www/poponeko/data/class/SC_Query.php(1007): trigger_error