Magento 2: How to resolve Item with the same ID “ID” already exists error?

Magento2 product errors: Item (Magento\Catalog\Model\Product\Interceptor) with the same ID “<id>” already exists.

Then you can use the below module to resolve the above error.

• Create new folders RSCoder/DuplicateEntry in app/code Magento folder.
• registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
 \Magento\Framework\Component\ComponentRegistrar::MODULE,
 'RSCoder_DuplicateEntry',
 __DIR__
);

• etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
 <module name="RSCoder_DuplicateEntry" setup_version="1.0.1"></module>
</config>

• etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
 <type name="Magento\Eav\Model\Entity\Collection\AbstractCollection">
    <plugin name="find_duplicate_entry" type="RSCoder\DuplicateEntry\plugin\Collection" sortOrder="20"/>
 </type>
</config>

• plugin/Collection.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 */
namespace RSCoder\DuplicateEntry\plugin;
use Magento\Framework\Data\Collection\EntityFactoryInterface;
use Magento\Framework\Option\ArrayInterface;
class Collection
{
    /**
     * @param \Magento\Eav\Model\Entity\Collection\AbstractCollection $subject
     * @param \Closure $process
     * @param \Magento\Framework\DataObject $dataObject
     * @return $this
     */
    public function aroundAddItem(\Magento\Eav\Model\Entity\Collection\AbstractCollection $subject, \Closure $process, \Magento\Framework\DataObject $dataObject)
    {
        try{
            return $process($dataObject);
        }catch ( \Exception $e){
            return $this;
        }
    }
}

Now enable the above module & It’s working fine.

Reference Link: http://www.rscoder.com/2019/12/magento-2-how-to-resolve-item-with-same.html