Naming series wont Update

i create a custom naming series

I have create several transaction, and i have cancelled and delete them all
In naming series, Update series number for current value to “0”
Thus when i create another PO, the number still continue to PO-2016-10-0008.
Eventhough there is no more document (neither cancceled, draft or anything)

Thanks for your help

Please check

I think that is what @khaterines and still is starting with #008 (instead of #001 as intended)

If this issue is still prevailing, please share screenshot of Naming Series - Current Value and new PO created.