Magento bms/erp migration from 1.9.3.2 to 2.3.4

I am doing the bms/erp migration from 1.9.3.2 to 2.3.4 and created a custom map xml for that but getting this error while migrating data:

[Exception]
Notice: Undefined offset: 146 in /var/www/html/magento/vendor/magento/data-migration-tool/src/Migration/Step/Eav/Data.php on line 817.