Problems with consulting indexes with GPT

Hi guys, i’m new here. I’m having a problem in a LLM solution on my work and want advices to solve this problem. The aplication is a Generative AI chatbot that helps call center operators solve clients problems. The solution is for a eletrodomestics enterprise, and the AI have access to documents of internal process (like how the workers may respond and act) and products technical manuals, with a lot of information about the products. The issue is that when asking about some information about a product (the dimensions), the value that is in the manual is 652mm and 1120mm, but the chatbot returns 625mm and 1070mm. I’m using the Azure ecosystem with Open Ai, and the data of the documents are saved in indexes (use AI Search to make the indexes). How can i solve this problem?