QuartusII: Invalid assignment for clock

thanks for your answer, but now I've another problem :)

in the same project, I have 2 clocks in input: 'ref_clk_i' and 'clock_i'.

I set up these clocks with tickle commands

create_clock -period 10 -name ref_clk_i [get_ports ref_clk_i]

create_clock -period 1 -name clk_i [get_ports clk_i]

and after that I clicked 'Update the timing netlist', but this is the warning message I received:

warning: the following clock transfers have no clock uncertainty assignment

warning: from ref_clk_i (rise) to ref_clk_i (rise) (setup and hold)

warning: from clk_i (rise) to ref_clk_i (rise) (setup and hold)

warning: from clk_i (fall) to ref_clk_i (rise) (setup and hold)

Where am I going wrong?