Ok, thank you for the answer!
No worries, that won't be necessary at the moment. I'll try to "recycle" it when I make a new blog entry. (You can change the title, text, category and anything else via edit. So if I have prepared a completely new blog entry, I just overwrite the content there and un-delete it
).
But since this is possible I wonder why users are not allowed to delete their own blog entries. This doesn't make sense to me.