An AI agent is designed to automate inventory reordering. It grounds its decisions by checking two data sources: A real-time sales database where a product is identified by product_ID : "HZ-1024". A supplier's catalog API where the same product is identified by item_code : "Hazel-1024". The agent frequently fails to reorder this popular item, leading to stockouts and lost sales. This is because it cannot reliably match the product between the two systems. Which data quality characteristic is the root cause of this direct financial impact?