WordPress Database error In Debug.log

I received this error message in my debug file this morning and wanted to know how bad of an error this could turn out to be.
WordPress database error Table ‘wordpress828.wp__blc_instances’ doesn’t exist for query SELECT instance_id FROM wp__blc_instances WHERE container_id = 9572 AND container_type = ‘post’ made by wp_trash_post, wp_update_post, wp_insert_post, wp_transition_post_status, do_action(‘trash_post’), WP_Hook->do_action, WP_Hook->apply_filters, call_user_func_array, blcPostTypeOverlord->post_deleted

My website has not crashed or anything like that. I just want to stay on top of my debug and know what this error message means so when my boss asks me about I have a good idea of why this happened.