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 :
SELECT * FROM eav_attribute_set WHERE attribute_set_id = '21';
SELECT * FROM eav_attribute_group WHERE attribute_set_id = '21';
Table : eav_attribute_set
What value should i delete?