Command prompt error

Hello,

I am using latest version of this plugin but run time error is created on our site. This error shows up repeatedly on the command prompt whenever we click on the menu buttons on the site to navigate into a different page. So on clicking the menu buttons or anywhere else to navigate into a different page on the site, the command prompt loads the error code, stating there is a duplicate file/table on the slider. This is still a slider issue for sure, or the way it has been set up or named on the database.

Error:

2016/03/31 15:22:00 [error] 18906#0: *20770 FastCGI sent in stderr: “PHP message: WordPress database error Duplicate column name ‘sl_position’ for query ALTER TABLE wp_huge_itslider_sliders ADD sl_position TEXT NOT NULL AFTER param made by require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), include_once(‘/plugins/slider-image/slider.php’), huge_it_slider_activate” while reading response header from upstream, client: 81.144.151.195, server: dev.richardsoneyres.co.uk, request: “GET /wp-admin/admin-ajax.php?action=megamenu_css&ver=1.7.4 HTTP/1.1”, upstream: “fastcgi://unix:/var/run/php-main.socket:”, host: “dev.richardsoneyres.co.uk”

https://wordpress.org/plugins/slider-image/