EDT - I can't modify the timetable, an error message tells me that the active period is sealed.

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I can't modify the timetable, an error message tells me that the active period is sealed.

If a user decides to seal a period, it is no longer editable: you will not be able to modify any data relating to this course for the concerned period (grid location, subjects, resources, etc.).

To seal or unseal a course, go to Parameters > INSTITUTION > Periods then tick/un-tick the box Seal. of the concerned period.

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