ID:176493 Can't place <name> I/O pin "<name>" in location <name> -- location is already occupied by <name> I/O <name> pin

CAUSE: The Fitter cannot place the specified DQS I/O, nDQS or DQ I/O pin in the specified location because that location is already occupied by the specified type of I/O pin. The location may have been chosen by the Fitter due to location assignments. If you did not make the location assignment, the specified location represents the last location in which the Fitter attempted to place the specified I/O pin.

ACTION: Modify the location assignments for the specified I/O pin or compile the design targeting a different device.