REST API: catalogCategoryLinkManagement error if same product in multiple subcategories of parent

[nthurston]

Preconditions (*)

1. Magento 2.4-develop

Steps to reproduce (*)

1. Create a category with 2 sub categories
   
2. Assign same product to both sub categories
   
3. Call /V1/categories/{categoryId}/products with the parent category id

Expected result (*)

1. List of all products assigned to parent category

Actual result (*)

1. "Internal Error. Details are available in Magento log file. Report ID: webapi-5f8579e37db54"
   

2. main.CRITICAL: Report ID: webapi-5f8579e37db54; Message: Item (Magento\Catalog\Model\Product\Interceptor) with the same ID "1" already exists. {"exception":"[object] (Exception(code: 0): Report ID: webapi-5f8579e37db54; Message: Item (Magento\Catalog\Model\Product\Interceptor) with the same ID "1" already exists. at /var/www/html/magento2dev/lib/internal/Magento/Framework/Webapi/ErrorProcessor.php:208, Exception(code: 0): Item (Magento\Catalog\Model\Product\Interceptor) with the same ID "1" already exists. at /var/www/html/magento2dev/lib/internal/Magento/Framework/Data/Collection.php:408)"} []

Notes

1. It should be noted the same thing happens if you assign a product to a parent category and a sub category of that parent.

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• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

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[m2-assistant]

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[magento-engcom-team]

✅ Confirmed by @engcom-Delta
Thank you for verifying the issue. Based on the provided information internal tickets MC-38413 were created

Issue Available: @engcom-Delta, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.