We are running Magento store having 8k products. The tow indexing is not working. Throwing some errors. Product Flat Data Error

Product Flat Data index process unknown error:
exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 1005 Can't create table './bofc_magento/#sql-f22_6554c.frm' (errno: 121)' in /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Zend/Db/Statement/Pdo.php:228
Stack trace:
#0 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Zend/Db/Statement/Pdo.php(228): PDOStatement->execute(Array)
#1 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Varien/Db/Statement/Pdo/Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array)
#2 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Zend/Db/Statement.php(300): Varien_Db_Statement_Pdo_Mysql->_execute(Array)
#3 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Statement->execute(Array)
#4 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('ALTER TABLE `ca...', Array)
#5 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Varien/Db/Adapter/Pdo/Mysql.php(389): Zend_Db_Adapter_Pdo_Abstract->query('ALTER TABLE `ca...', Array)
#6 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Varien/Db/Adapter/Pdo/Mysql.php(327): Varien_Db_Adapter_Pdo_Mysql->query('ALTER TABLE `ca...')
#7 /var/www/vhosts/beadsofcambay.com/httpdocs/lib/Varien/Db/Adapter/Pdo/Mysql.php(2548): Varien_Db_Adapter_Pdo_Mysql->raw_query('ALTER TABLE `ca...')
#8 /var/www/vhosts/beadsofcambay.com/httpdocs/app/code/core/Mage/Catalog/Model/Resource/Product/Flat/Indexer.php(816): Varien_Db_Adapter_Pdo_Mysql->addForeignKey('FK_CAT_PRD_FLAT...', 'catalog_product...', 'entity_id', 'catalog_product...', 'entity_id', 'CASCADE', 'CASCADE')
#9 /var/www/vhosts/beadsofcambay.com/httpdocs/app/code/core/Mage/Catalog/Model/Resource/Product/Flat/Indexer.php(1390): Mage_Catalog_Model_Resource_Product_Flat_Inde
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