help need...regarding ROUTING FILTER

In MikroTik 5.8 if I apply the command

/routing filter add chain=Link1_OUT prefix=111.222.333.0/24 action=accept

The print command shows me:

chain=Link1_OUT prefix=111.222.333.0/24 invert-match=no action=accept

And in MikroTik 5.12 if I apply the command, the print command shows me:

chain=Link1_OUT prefix=111.222.333.0/24 invert-match=no action=accept set-bgp-prepend-path=""

That means set-bgp-prepend-path=“” is new here. What should I dow for this? Please help me as I am not expert.

p.s. in 5.8, my configuration is perfectly working. But same command in 5.12 is not working.

Try this:

You will need to get the line number from a print.

/routing filter unset (line number) set-bgp-prepend-path

thanks.