The clock modifying block <netlist_element> is configured for digital deskew and has
PHASESHIFT_MODE=WAVEFORM. This combination is
unsupported, and timing analysis is proceed by treating it as if PHASESHIFT_MODE = LATENCY. Change the specified cell
configuration to PHASESHIFT_MODE= LATENCY and ensure
that no timing constraints are written against the expectation of PHASESHIFT_MODE=WAVEFORM.