JTAG timing violations

I added another SDC file containing JTAG signal Constraints template but I still have JTAG violation 

the first SDC have 

create_clock -name {altera_reserved_tck} -period 30 [get_ports {altera_reserved_tck}]
set_clock_groups -asynchronous -group {altera_reserved_tck}

and the second SDC have JTAG Signal Constraints as generated by steps mentioned above.

 the slack increased to -48.914 as it added Data required time -44.688 Vs in previous run it was reported as 0.