Pupil has at least one learning aim which was active in the previous academic year but there are no previous year planned learning hours recorded.
Go to the Student Profile and click Enrolment on the left. Here you will see their Planned Learning Hours.
If you scroll down to their Programmes and click on one.
You will see Planned Learning Hours are Not Set. Click to Edit and input the programme Planned Learning hours here. Then click Save Changes.
Then you will need to regenerate your census for the error code to be resolved.