@sixaxis
Are you referring to WooCommerce product stock logs that are created by the Stock Manager for WooCommerce plugin? Currently, it does not include a feature to delete stock logs. However, we’ve noted this request and will consider it for upcoming updates.
Alternatively, you can try our best store management plugin – Smart Manager, which includes all the features of the Stock Manager for WooCommerce plugin, along with deleting stock logs (both manually or automatically removing logs older than 90 days), it also provides detailed logging of WooCommerce product changes (inventory, price and other product fields) across edits from the admin screen, third‑party plugins, or REST API, the ability to undo these changes, and other powerful features like Bulk Edit, Advanced Search, and more. Click here to check its functionality.