WordPress database error Duplicate entry

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Since installing on 5.4.1 version I am getting this error message:

This was for a free download which is maybe why the purchase_id = 0 and causing this duplication ?

[20-May-2020 08:47:08 UTC] WordPress database error Duplicate entry ‘269-0’ for key ‘product_purchase’ for query INSERT INTO pr_msdb_purchase (product_id, purchase_id, date, email, amount, paypal_data) VALUES (269, ‘0’, ‘2020-05-20 08:47:08’, ‘xx.xxx.xx.xx’, 0.000000, ”) made by require(‘wp-blog-header.php’), require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), do_action(‘init’), WP_Hook->do_action, WP_Hook->apply_filters, MusicStore->init

Thanks
Sarah