When this box is checked, a preliminary deletion of the parameters at the destination level is carried out before the copy. For instance, if parameters belonging to user A (some of whose parameters are inherited from the site) are copied to user B (some of whose parameters are defined at the level of the user themselves), then:
- if the box is checked, after the copy, these parameters will be for user B inherited from the site they are dependent on (and not from the site user A is dependent on) : the local values that were not copied are lost.
- if the box is not checked, user B keeps the local values of their parameters if the latter are not locally defined by user A.