Mysql Error On Install Product Variations Add-Ons

Hello to all here! When I try to install "Product Variations" add-ons I get this error message:
An error occurred in a SQL query while installing the add-on. The add-on cannot be installed.
Duplicated column name 'parent_product_id' (1060): ALTER TABLE cscart_products ADD parent_product_id int(11) unsigned NOT NULL DEFAULT '0';
is this an add-ons conflict or something else. Thanks.

Login phpMyAdmin, find the cscart_products table and delete the parent_product_id column before module installation. Make a backup just in case

Hello eComLabs!

Thanks for you Answer but my Problem is no solved. After delete the parent_product_id column have try again to install this Add-Ons and now i have this Error-Message:

An error in an SQL query occurred during the add-on installation. The add-on will not be installed.

INDEX command denied to user 'xxxxxxxxxxx'@'localhost' for table 'cscart_products' (1142): CREATE INDEX idx_parent_product_id ON cscart_products (parent_product_id);

Have Problem solved, see Screenshot

thanks for posting the answer