Substitution of the brand with the wrong one

The system has a product brand "555" and there was a brand Ermax under the id 555, due to which the product periodically arbitrarily changed the brand from 555 to Ermax when I discovered this, I deleted the Ermax brand, but the situation with the product continued, and at a random moment, one of the products jumps from brand to brand and has to be manually changed to the correct one I ask for help to solve the problem - I have been suffering for half a year, I am fed up P.S. There is no such brand Ermax in the price lists that are uploaded here is an example https://carzone.crm-onebox.com/app/product/27410/edit/