Major mistake

Hello, I am IAIN, please help Thank you !
When I enable him every time, it will always display (it will appear in different environments):WordPress database error: [Specified key was too long; max key length is 1000 bytes]
CREATE TABLE IF NOT EXISTS wpfk_sb_Blocks ( id int(11) NOT NULL AUTO_INCREMENT, wp_owner_id int(11) unsigned NOT NULL, key_id int(11) NOT NULL, block_name varchar(255) NOT NULL, locked tinyint(1) NOT NULL DEFAULT 1, notify_redeem tinyint(1) NOT NULL DEFAULT 1, UNIQUE KEY block_name (block_name), UNIQUE KEY id (id) );