Did you delete the earlier static route which you configured without qualified next-hop?
root@PE1_re# set routing-options rib inet6.0 static route ::/0 qualified-next-hop fe80::5668:a3ff:fe1f:21c2 interface ge-0/0/3.0
[edit]
root@PE1_re# commit
commit complete
[edit]
root@PE1_re# show routing-options
rib inet6.0 {
static {
route ::/0 {
qualified-next-hop fe80::5668:a3ff:fe1f:21b5 {
interface ge-0/0/3.0;
}
}
}
}
router-id 150.0.0.11;
autonomous-system 100;
[edit]
root@PE1_re#
[edit]
root@PE1_re# run show route table inet6.0
inet6.0: 7 destinations, 8 routes (7 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
::/0 *[Static/5] 00:00:08
> to fe80::5668:a3ff:fe1f:21b5 via ge-0/0/3.0