Magento 2 custom product relation module development or bug fix for existing module

Hi, We need a simple Magento 2 custom product relation module developed or fix the error that is generated by our existing module saying "Exception #0 (Exception): Item (Boolfly\ProductRelation\Model\Product\Interceptor) with the same ID "2" already exists." We have a long list of work to be done on the website so anyone that can work long term, has expertise in custom work both front- and backend for magento 2 and are available for work straight away is more than welcome. In your bid state the word: "Hej" to prove that you have read the description. We will not consider anyone not stating that in their bid! We look for people (preferably teams with several Magento 2 developers) that can work right away, that we can trust and that we continuously can delegate custom Magento 2 work to. Thank you