AVSPI Core Attributes Failure

In one of the AVSPI core files, spiphyslave.v, are several set_false_path attributes that are causing several warnings such as the following, during Compile:

/*local reg for shift register*/

(* altera_attribute = {"-name SDC_STATEMENT \"set_false_path -from [get_pins -no_case -compatibility_mode *SPIPhy_altera_avalon_st_idle_inserter|received_esc*|*] -to [get_pins -no_case -compatibility_mode *|rdshiftreg*|*]\" "} *) reg [7:0] rdshiftreg;

Warning (332049): Ignored set_false_path at qfit2_legacy_fmain_fitter_flow.tcl(117): Argument <from> is an empty collection

Info (332050): run_legacy_fitter_flow

Since this is down inside a Quartus IP, is there a recommended way to handle this?

For example, should the core file(s) be modified by commenting out the failing set_false_path constraints and replace with corresponding SDC file constraints? This seems like a stretch, modifying a tool-generated core. Is there a more suitable solution?

Thank you.