(usagi-users 03305) setkey can't set SPD properly

Hello, all

Now, I am testing ipv6 with TAHI. I met a problem and I think maybe it's sensible to post it here.
I want to set two SPD with same IPsrc, same spi, but just different protocol. But I can't set this two entries.
for example:
I first run the script to set SPD

/sbin/setkey -c <<EOD
 spdadd 3ffe:501:ffff:ff04::/64 3ffe:501:ffff:ff01::/64
 any
 -P in ipsec
 esp/tunnel/3ffe:501:ffff:ff02:200:ff:fe00:a1a1-3ffe:501:ffff:ff00:200:f f:fe00:b0b0/require;
 spddump;
 EOD

It set correctly;
then I run next script just change protocol

/sbin/setkey -c <<EOD
 spdadd 3ffe:501:ffff:ff04::/64 3ffe:501:ffff:ff01::/64
 any
 -P in ipsec
 ah/tunnel/3ffe:501:ffff:ff02:200:ff:fe00:a1a1-3ffe:501:ffff:ff00:200:f f:fe00:b0b0/require;
 spddump;
 EOD

It says file has already exists.

I want to ask why I can't set SPD properly.Or is it impossible to have two policies which only differ by templates.

Thank you in advance!

Best Regards
Lv Liangying