Zend certified PHP/Magento developer

Migration from Magento 1.9 to Magento 2.3 – Duplicated websites

I migrated from Magento 1.9.1 to Magento 2.3.4 using Data Migration Tool.

I follow the Settings – Data – Delta steps but at least i obtain duplicated websites/views of my site.

When I try to access to one category on my site I obtain the following error message: “There has been an error processing your request – The store that was requested wasn’t found. Verify the store and try again”.

Please can you help me to solve the issue?
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