ID:303003 Formal verification may give mismatches -- Allow register retiming to trade off Tsu/Tco with Fmax is turned on

CAUSE: You attempted to optimize netlists during synthesis by directing the Quartus Prime software to move logic across registers that are associated with I/O pins during register retiming to trade off fMAX . You then specified a formal verification tool for the current project, and compiled the design. However, formal verification may give mismatches between the pre- and post-Quartus Prime netlists if the logic feeding registers is modified in the design due to this option.

ACTION: Specify that the Quartus Prime software not move logic across registers that are associated with I/O pins during register retiming, and recompile the design.