How to solve “Unable to apply data patch” when upgrading?

Question

I'm upgrading my Magento 2.3.2 to Magento 2.3.5 and I'm receiving this following error during upgrade:

Module ‘Magento_Wishlist’: Unable to apply data patch 
Magento\Wishlist\Setup\Patch\Data\CleanUpData for module Magento_Wishlist. Original exception 
message: Unable to unserialize value. Error: Syntax error

how could I solve it?

Answer 1

Probably happening because you have bundle products in your store.

Merchants who encounter this error after installing Magento 2.3.5 should upgrade to Magento 2.3.5-p1.

Merchants who encounter this error after installing Magento 2.3.4-p1 should upgrade to Magento 2.3.4-p2.

Reference: Wishlist error during upgrade to Magento versions 2.3.4-p1 or 2.3.5.

Answer 2

Getting below error at the time of bin/magento setup:upgrade

Module ‘Magento_Wishlist’: Unable to apply data patch Magento\Wishlist\Setup\Patch\Data\CleanUpData for module Magento_Wishlist. Original exception message: Unable to unserialize value. Error: Syntax error

Solution:

The simplest – delete OR move the

CleanUpData.php

file from the vendor folder

/vendor/magento/module-wishlist/Setup/Patch/Data/CleanUpData.php

Answer 3

Run these commands from the root directory of your store.

composer require magento/product-community-edition 2.3.5-p1 --no-update

composer update

php bin/magento setup:upgrade

php bin/magento cache:clean

php bin/magento setup:static-content:deploy -f