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  Can I cancel an operation?

When you work on a network, you can't go back because every action has an immediate impact on the work of others. For example, if you cancel a course, the course's room becomes immediately available and bookable by others. However, it is possible to redo or undo if the resources concerned are still available.

To avoid mistakes, here are some tips:

• verify the active period before taking any action,
• lock courses that are not to be modified,
• work on lighter interfaces by conducting extractions and by durably masking the data that does not concern you.