I made Journal Entry in the past and found there is problem, so I emptied the account. I still want to use the Ref No with a new Journal in the future.
When I wanted to delete it, it is locked.
I just unlocked date and it worked.
You just reminded me that just unlock the date and I can use the Ref No.
Note:
Regarding your question, I used to leave the journal account blank, so that it won’t implicate accounting matter while I am pending the Ref No.
I can use the Ref No in the future.