Title: _bundle_cart_key Replacing PPOM Data
Last modified: August 10, 2026

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# _bundle_cart_key Replacing PPOM Data

 *  Resolved [lukesx](https://wordpress.org/support/users/lukesx/)
 * (@lukesx)
 * [5 days, 15 hours ago](https://wordpress.org/support/topic/_bundle_cart_key-replacing-ppom-data/)
 * We have a short question on our kitchen door pages: it’s whether the user would
   like to add hinge hole drilling to the door product, with 3 options for where
   the hole will be on the door. 
   This data usually feeds through perfectly, but
   this time it didn’t display the data, and instead had a “_\_bundle\_cart\_key_”
   which displayed on the WooC backend, as well as the email notifications.I cannot
   recreate this error, and it’s something I’ve never seen before or since, but 
   it’s caused a refund in the several hundreds, so I want to at least explore a
   precautionary action to avoid in the future.Anyone ever experience this error
   before and know a way to avoid in the future?**Plugin version**: v34.0.7**WordPress
   version**: 7.0.3.

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Support [Poonam Namdev](https://wordpress.org/support/users/poonam9/)
 * (@poonam9)
 * [5 days, 9 hours ago](https://wordpress.org/support/topic/_bundle_cart_key-replacing-ppom-data/#post-18989380)
 * Hi [@lukesx](https://wordpress.org/support/users/lukesx/),
 * Are you using any WooCommerce bundle plugin on your site? If yes, could you share
   the exact name (and version, if possible) of the plugin? That will help us try
   to replicate the issue on our end.
 *  Thread Starter [lukesx](https://wordpress.org/support/users/lukesx/)
 * (@lukesx)
 * [5 days, 7 hours ago](https://wordpress.org/support/topic/_bundle_cart_key-replacing-ppom-data/#post-18989566)
 * Thanks for your response, Poonam.
   There is no product bundle plugin downloaded
   or activate on the website, and there’s no bundle products – all simple/variable
   products.I’m completely stumped on where this is being pulled in from.
 *  [malexandric](https://wordpress.org/support/users/malexandric/)
 * (@malexandric)
 * [2 days, 16 hours ago](https://wordpress.org/support/topic/_bundle_cart_key-replacing-ppom-data/#post-18992146)
 * Hi [@lukesx](https://wordpress.org/support/users/lukesx/)
 * Thanks for confirming that. This sounds like a similar case we have seen before,
   where the same “_bundle_cart_key” text appeared in place of the PPOM options 
   even though no bundle plugin was installed. You can find that discussion here:
 * [https://wordpress.org/support/topic/custom-field-sometimes-missing-in-order-page-replaced-with-bundle_cart_key/](https://wordpress.org/support/topic/custom-field-sometimes-missing-in-order-page-replaced-with-bundle_cart_key/)
 * In that case the issue was linked to express checkout buttons (PayPal, Google
   Pay, Apple Pay) placed on the product or cart pages. Orders placed through those
   buttons can skip the normal WooCommerce checkout process, which is when the PPOM
   data gets lost. The user in that thread resolved it by disabling the “PayPal 
   Now Experience” option in the WooCommerce PayPal Payments settings, so customers
   go through the regular checkout page instead.
 * Could you check if you are using WooCommerce PayPal Payments with that option
   enabled, and try turning it off? It would also help to know which payment method
   was used on the affected order.
 * Please let us know how it goes.
 *  Thread Starter [lukesx](https://wordpress.org/support/users/lukesx/)
 * (@lukesx)
 * [2 days, 15 hours ago](https://wordpress.org/support/topic/_bundle_cart_key-replacing-ppom-data/#post-18992226)
 * Thank you [@malexandric](https://wordpress.org/support/users/malexandric/).
 * I’ve now deactivated the express checkout for PayPal – this seems to align with
   the previous order details where the issue arose.
 * I appreciate your help.
 *  [malexandric](https://wordpress.org/support/users/malexandric/)
 * (@malexandric)
 * [2 days, 13 hours ago](https://wordpress.org/support/topic/_bundle_cart_key-replacing-ppom-data/#post-18992322)
 * Hi [@lukesx](https://wordpress.org/support/users/lukesx/)
 * Glad we could help!
 * Let us know if the issue reappears after this.

Viewing 5 replies - 1 through 5 (of 5 total)

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 * ![](https://ps.w.org/woocommerce-product-addon/assets/icon-256x256.gif?rev=3186763)
 * [PPOM - Product Addons & Custom Fields for WooCommerce](https://wordpress.org/plugins/woocommerce-product-addon/)
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 * 5 replies
 * 3 participants
 * Last reply from: [malexandric](https://wordpress.org/support/users/malexandric/)
 * Last activity: [2 days, 13 hours ago](https://wordpress.org/support/topic/_bundle_cart_key-replacing-ppom-data/#post-18992322)
 * Status: resolved