you should to run sql queries manually via phpMyAdmin.
Regarding error i guess you should to start since line 1091
https://github.com/abantecart/abantecart-src/blob/master/public_html/install/abantecart_database_upgrade.sql#L1091
Do not forget to replace table prefix with yours before
Regarding error i guess you should to start since line 1091
https://github.com/abantecart/abantecart-src/blob/master/public_html/install/abantecart_database_upgrade.sql#L1091
Do not forget to replace table prefix with yours before

