Can't edit product or create new attribute set after migration

[quizmask]

I used data-migration-tool to migrate my store from 1.9.2.2 to 2.1.14, but after the migration, I find I can't open "edit" page of any existing product. The following error message show up:

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There has been an error processing your request.

The configuration parameter "formElement" is a required for "" field.

Error log record number: 1495859023951

(Yes, there is nothing in the second quote mark)

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Also, I tried to add new product, with new attribute set, but when I configured it and click "save", it shows:

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Attribute with the same code already exists.

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Anyone knows how to solve it?

[Prince Patel]

Hi @quizmask

You have duplicate attribute with the same code value in the product attributes.

Find duplicate attribute from Admin->Stores->Attributes->Product and delete one attribute and try to save product.

Note: Make sure first you check that that attribute is not used with any product.

If Issue Solved, Click Kudos/Accept As solutions.

[quizmask]

I checked my Product Attributes, but didn't find any duplicated attribute code.

Is there any other problem can cause this issue?

[masukmian]

No duplicate, still getting error:

An attribute with the same code (product_type) already exists.

Also while editing existing attribute too.

[shanetn]

I had the same issue. I changed the label to something other than "Product Type" and it saved successfully.