You need to use two filters
woocommerce_add_cart_item_data and woocommerce_add_to_cart_validation
For details https://pluginrepublic.com/add-custom-cart-item-data-in-woocommerce/
You need to use two filters
woocommerce_add_cart_item_data and woocommerce_add_to_cart_validation
For details https://pluginrepublic.com/add-custom-cart-item-data-in-woocommerce/