Order ID missed in the DB

Hello,
I made detailed investigation about why Images are not comming in the emails and in the WooCommerce Orders Dashboard.
I found that acually they are uploaded to the woo-file-dropzone-uploads folder and there are 2 images less than the images in the database table wp_9y8tmyqz6h_woo_file_dropzone. In that table for some reason the order_id is NULL for all files in this Table, instead of the fors one , which were made in September and the Image Appears as attachment in the e-mail also appear in the Woo File Dropzone section in Orders.
If I manually edit and fill the order ID in the DataBase Table with the number of the last order( # is taken from my last test) and refresh the WooCommerce Order Page, then the image is there.

Please provide opinion and solution, how can I use your plugin like before. By before I mean before something went wrong – may be the woocommerce update.

I use Version 3.4.5 , Woo File Dropzone Version 1.1.7

The page I need help with: [log in to see the link]