Default value for dpd is set twice

config.c#L660, config.c#L667:

static void apply_default_conf(vhost_cfg_st *vhost, unsigned int reload)
{
  // ...
  vhost->perm_config.config->dpd = DEFAULT_DPD_TIME;
  // ...
  vhost->perm_config.config->dpd = 60;
  // ...
}

vpn.h#L105:

#define DEFAULT_DPD_TIME 600

Which value is more preferable as default? 60 or 600? I'm guessing 60 because the in sample.config it is set to 90:

dpd = 90

which is closer to 60 than 600