A negative area of steel bars (AST) in column design indicates an issue with the design parameters, particularly when the required design strength exceeds the available area. If the design's required load cannot be supported by the provided area of reinforcement, it suggests that the column is inadequately sized or that the load assumptions may be incorrect. Adjusting the column dimensions or increasing the number of bars may resolve the issue. Additionally, reviewing the load calculations and ensuring compliance with design codes is essential. Proper assessment and modification can prevent structural failures.