ID:170217 Fitter has combined <number> register-only logic cells with unrelated combinational logic cells

CAUSE: The Fitter has combined the specified number of register-only logic cells with unrelated combinational logic cells. This action by the Fitter occurs automatically when the selected device is full and you have set the Auto Packed Registers logic option to Auto Sparse, Auto, Minimize Area or Minimize Area with Chains for all or part of the design. Combining registers with unrelated logic can sometimes affect the maximum design performance.

ACTION: No action is required if the desired timing has been achieved. If the design performance is affected, reducing logic utilization with design changes or moving to a large device can be beneficial.