A logistics company wants to build a Copilot Studio agent that answers customer shipment-status questions by grounding responses in an internal SQL database. During requirements analysis, the architect discovers the shipment table is updated only once per night via a batch job, contains many duplicate records from a legacy merge, and includes several free-text status fields with inconsistent terminology. The business insists customers must receive accurate, up-to-the-minute status. Which data-grounding concern should the architect flag as the PRIMARY blocker to meeting the stated business requirement?