Image copying errors

Hi, when a post tries to copy an image, the thumbnail shows up on the edit screen of the new post, but the actual image doesn’t show in the post. Here’s a couple errors that we got:

[Fri Sep 01 11:36:30.615966 2017] [:error] [pid 11087] [client 31.54.94.53:61506] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘* FROM wp_-1_posts WHERE 1=1 AND wp_-1_posts.post_type = ‘post’ AND ((wp_-1_po’ at line 1 for query SELECT wp_-1_posts.* FROM wp_-1_posts WHERE 1=1 AND wp_-1_posts.post_type = ‘post’ AND ((wp_-1_posts.post_status = ‘publish’ OR wp_-1_posts.post_status = ‘draft’ OR wp_-1_posts.post_status = ‘pending’ OR wp_-1_posts.post_status = ‘private’)) ORDER BY wp_-1_posts.post_date DESC /* From [20schemes.com/uk/wp-admin/admin-ajax.php] in [/nas/content/live/schemes2017/wp-content/plugins/multisite-post-duplicator/inc/persist.php:145] */ made by do_action(‘wp_ajax_mpd_create_link_post_list’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, mpd_create_link_post_list, get_posts, WP_Query->query, WP_Query->get_posts, referer: https://20schemes.com/uk/wp-admin/post.php?post=3355&action=edit
[Fri Sep 01 11:36:30.616746 2017] [:error] [pid 11087] [client 31.54.94.53:61506] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘-1_options WHERE option_name = ‘sticky_posts’ LIMIT 1 /* From [20schemes.com/uk/’ at line 1 for query SELECT option_value FROM wp_-1_options WHERE option_name = ‘sticky_posts’ LIMIT 1 /* From [20schemes.com/uk/wp-admin/admin-ajax.php] in [/nas/content/live/schemes2017/wp-content/plugins/multisite-post-duplicator/inc/persist.php:145] */ made by do_action(‘wp_ajax_mpd_create_link_post_list’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, mpd_create_link_post_list, get_posts, WP_Query->query, WP_Query->get_posts, get_option, referer: https://20schemes.com/uk/wp-admin/post.php?post=3355&action=edit