Your team has just completed a critical investment analysis report for a key client. In the final review stage, you discover a material error in a crucial data point supporting the core investment recommendation. Rectifying this error would significantly reduce the report's investment attractiveness, potentially jeopardizing the client's interest in the product and your team's performance bonus for the project. Your project lead, a senior colleague, appears to have either overlooked or intentionally disregarded this discrepancy. How would you handle this situation? Please walk me through your thought process and specific actions.