Anonymous page update - how could it happen?



There was an anonymous page update made on the site a month ago. I haven't seen that before, how could it happen?

Everything in the Versions tab like version, language, status, date...have data but the "By" column is blank.

Epi version 6.

Feb 07, 2018 9:41
* You are NOT allowed to include any hyperlinks in the post because your account hasn't associated to your company. User profile should be updated.