#Get the old value before changing anything
my $base_period = C4::Context->preference('RenewalPeriodBase');
$dbh->do(
if ($base_period) {
q{
UPDATE systempreferences SET variable = 'ManualRenewalPeriodBase' WHERE variable = 'RenewalPeriodBase'
}
);
say_success( $out, "System preference RenewalPeriodBase updated to ManualRenewalPeriodBase" );
INSERT IGNORE INTO systempreferences (`variable`,`value`,`options`,`explanation`,`type`)
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