Auto Increment in the table hikashop_category

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.6.27
-- Browser(s) name and version -- : any

I want to modify the auto increment with this sequence after delete all custom categories in a built custom component:

$query = "ALTER TABLE #__hikashop_category AUTO_INCREMENT = 14";

But it seems it doesn't work properly.

It's the sentence fine?

Or I can't alter the auto increment in this table?

Thanks in advance.

-- Víctor