Solved: Integrity Constraint Violation Error Referring to quote_item Table While Adding Product to Cart in Magento 2

Magento 2 CMS permits altering the default highlights in light of business prerequisites. Magento 2 occasions are executed to run custom code in light of a specific Magento 2 occasion or custom occasion.

Here, I am posting the answer for the blunder that happens while utilizing the occasion "checkout_cart_product_add_after".

You can utilize this occasion when you need to consequently add an item to the truck when the client adds one more unambiguous item to the truck.

For instance, a handling expense or a free thing can be naturally added as an item when a client decides to buy a thing.

In any case, when you carry out a similar utilizing the "checkout_cart_product_add_after" occasion, you might confront a mistake that states,

Trustworthiness requirement infringement: 1452 Can't add or refresh a youngster column: an unfamiliar key imperative come up short

The mistake happens in light of the fact that the computerized thing is saved.

You should simply eliminate or remark the $item->save();

When you eliminate "$item->save();", you'll get the integrity constraint violation error referring to quote_item table while adding product to cart for Magento 2.

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