Error when moving Windows installation ISO

[splitting11]

I'm using pve-9.0. An error occurred when I moved files between ZFS datasets.
mv: error copying './zh-cn_windows_11_business_editions_version_24h2_updated_aug_2025_x64_dvd_08e70c15.iso' to '/rpool/test1/zh-cn_windows_11_business_editions_version_24h2_updated_aug_2025_x64_dvd_08e70c15.iso': Invalid cross-device link
This is a ZFS mirror pool.
pool: rpool
state: ONLINE
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
ata-Great_Wall_GW560_128GB_MP31F54201693-part3 ONLINE 0 0 0
ata-Great_Wall_GW560_128GB_MP31F54205814-part3 ONLINE 0 0 0
root@node0:/rpool/test0# zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 15.7G 104G 104K /rpool
rpool/ROOT 2.05G 104G 96K /rpool/ROOT
rpool/ROOT/pve-1 2.05G 104G 2.05G /
rpool/data 96K 104G 96K /rpool/data
rpool/test0 6.66G 104G 6.66G /rpool/test0
rpool/test1 6.95G 104G 6.95G /rpool/test1
The error only occurred when this ISO file was moved; other files worked normally.