Error after a LXC Move

I did a LXC Move, it did copy but it could not delete, and still wont delete. It gives this error.

root@LARRY:/home/ic2000# lxc start WP-HAPPYDOGS
root@LARRY:/home/ic2000# lxc stop WP-HAPPYDOGS
root@LARRY:/home/ic2000# lxc delete WP-HAPPYDOGS
Error: Failed to destroy ZFS filesystem: cannot destroy snapshot local/containers/WP-HAPPYDOGS@migration-send-641a827b-d85d-4b0d-bc20-e282f2c716d7: dataset is busy

What is this all about? Thanks

Sounds like you have a stuck zfs send process on your system which is keeping that migration dataset active.