Conf 5.6.3: How can I delete pages from the page history of a blog post page?

[Evelin]

I can't delete versions from the page history of a blog post page and don't know why. The message says

Administration

Users

Not Permitted

You are not permitted to perform this operation.

I'm Confluence administrator, and the blog page has no view restrictions. There are edit restrictions, but I'm assigned as user in Editing restricted to.

Any ideas?

Regards, Evelin

[Evelin]

I can't even delete page versions of a blog post that I created in my personal space. I can delete the blog post as a whole, but not versions of it. Same message as above - You are not permitted ...

[Evelin]

I'm space admin for the space where the blog sits as well.