Validation Error "You are not allowed edit this field!"

Hi!

I'm creating a project in Clarizen that will be saved as a template and later be used by the department for creating projects.

Recently for some reason I get above stated error message when I'm trying to change names of the tasks in the project Work Plan. Based on the massage I guess there is some issue with the user rights. But I am the owner, have permission and stated as Project manager in the property card.

What can be the problem?

Thanks in advance!

/Simon