r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
if (r < 0) {
log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
if (r < 0) {
log_emergency("Failed to start default target: %s", bus_error_message(&error, r));