Hi to everyone!
I want to migrate my project to Jira Cloud from another system.
For this task, I created a new project, invited my team, and used import from CSV to import my tasks to the project.
All tasks were imported with a correct description, reporter, assignee, and correct created and resolved dates.
But also in every task, I see that Anonymous user updated the Rank. None ->Ranked lower. (see the screen below)
These changes also changed the updated field to the date of import.

I tried to change the Rank field in my CSV to numbers or to format such this 1|hzzzzz:
but anyway Anonymous updated the Rank.
Who is this Anonymous user, why he(or she) change Rank, and how I can import tasks with a correct Rank and updated field for all issues?