By default this syspref is "Do" to keep the previous behaviour.
Test plan :
1/ create 2 categories (A & B). B with enrolment fee
2/ create a patron in category A
3/ change the patron category from A to B
4/ check that the patron has an enrolment fee to pay
Apply the patch
1/ create a new patron in category A
2/ change the patron category from A to B.
3/ check that the patron has an enrolment fee to pay
4/ change the system preference 'FeeOnChangePatronCategory' to 'Don't';
5/ create a new patron in category A
6/ change the patron category from A to B
7/ check that the patron has no enrolment fee to pay
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
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