zfs volume created and still showing but connected datastore has been destroyed

[tellme]

@all,

FreeNAS-8.3.1-RELEASE-p2-x64 (r12686+b770da6_dirty)

i have created a disk which was da0 (i think), it was my first store i created
I am a beginner so i created a Volume CIF /mnt/Muziek on that disk.
Now i have deleted that disk da0 but the Volume /mnt/Muziek is still showing.
How to remove hat ?

I have read some and follow these commands, however the volume /mnt/Muziek is still showing

[root@Media] ~# sqlite3 /data/freenas-v1.db "select * from storage_disk;"
0|Disabled|Always On|||{devicename}da0|1|Disabled|Auto||||1|da0
1|Disabled|Always On|||{uuid}1db665b7-bc01-11e2-87cf-000c29a01fa9|1|Disabled|Auto||30 GB||2|da1
[root@Media] ~# sqlite3 /data/freenas-v1.db "select * from storage_diskgroup;"
Error: no such table: storage_diskgroup
[root@Media] ~# sqlite3 /data/freenas-v1.db "select * from storage_volume;"
2888729259727088396|vol1||ZFS|0|1
[root@Media] ~# sqlite3 /data/freenas-v1.db "delete from storage_disk where id=0;"
[root@Media] ~# sqlite3 /data/freenas-v1.db "delete from storage_diskgroup where id=0;"
Error: no such table: storage_diskgroup
[root@Media] ~# sqlite3 /data/freenas-v1.db "delete from storage_volume where id=0;"
[root@Media] ~# reboot

Is it possible to remove the fault zfs volume, the nas server still boots without any problem.

I have created a new disk da1 and mounted on /mnt/vol1 see picture.
Can someone advice me to get rid of the /mnt/Muziek Volume ?

Thanks for any kind of help

Tellme