Could not unserialize data of sales_flat_order_item.weee_tax_applied

### Preconditions

1. Magento 1.9.2.1 to Magento 2.3.4
2. PHP Version 7.2.33

### Steps to reproduce

1. Install data migration tool using composer
2. Set up necessary things like modification in config.xml, map.xml and class-map.xml

### Expected result

1. Migrated Successfully

### Actual result

1. Could not unserialize data of sales_flat_order_item.weee_tax_applied with record id 3740
2. Could not unserialize data of sales_flat_order_item.weee_tax_applied with record id 3746
3. Could not unserialize data of sales_flat_order_item.weee_tax_applied with record id 3753
4. so on and migration process stuck after these warning messages.
5. mostly all data migrated but sales gird data are not migrated in sales grid tables like order grid and invoice grid.

### Additional notes
I have tried these solution but did not help me to fix my issue.
https://github.com/magento/data-migration-tool/commit/f3cdd846246d3f2b26b3c3ac6f48c59032de85a7
https://www.catgento.com/2020/04/16/magento-2-migration-errors-unserialize/

Please help me to fix this issue

Start with the migration configuration files named in the report: config.xml, map.xml, and class-map.xml, then trace handling for sales_flat_order_item.weee_tax_applied and the reported record IDs. Reproduce the migration with Magento 1.9.2.1, Magento 2.3.4, and PHP 7.2.33; done means migration completes without unserialization warnings and the order and invoice grid data is migrated.

Written by the indexing model from the issue text.