Primary Keys Missing

Column id is not set as the Primary Key on tables wp_shortpixel_folders and wp_shortpixel_meta. This may result in data loss for users using cloud MYSQL services, more specifically those who are scaling via row-based replication.

DigitalOcean, for example, uses row-based replication and requires all database tables to specify a Primary Key https://www.digitalocean.com/docs/databases/mysql/how-to/create-primary-keys/

This is easily fixed by running:
ALTER TABLE wp_shortpixel_folders ADD PRIMARY KEY (id);
ALTER TABLE wp_shortpixel_meta ADD PRIMARY KEY (id);