Magento 2.3 migration - How to solve Duplicate entry error after data migration?

Note: I did data migration couple of times, during data migration max_allowd_packet issue then update and again run the data migration.

How to solve the php bin/magento setup:upgrade error, If i try to run upgrade command i am getting following error,

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate
entry ’21’ for key ‘PRIMARY’, query was: INSERT INTO
eav_attribute_set (entity_type_id, attribute_set_name,
sort_order, attribute_set_id) VALUES (?, ?, ?, ?)

Queries :

1. SELECT * FROM eav_attribute_set WHERE attribute_set_id = ’21’;

2. SELECT * FROM eav_attribute_group WHERE attribute_set_id = ’21’;

Table : eav_attribute_set

What value should i delete?