FIX: reset dualstack configuration

frontend/src/views/dnsvs/BCDRecords.vue

@@ -717,12 +717,10 @@ export default {
       this.parent_oe2mgr = apiutil.dict_of_lists_by_value_of_array(rangeResponse.data[14], 'ou_short_name')
       this.parent_oe_mgr = apiutil.dict_by_value_of_array(rangeResponse.data[15], 'login_name')
       this.vlans = rangeResponse.data[16]
+      this.has_v4 = this.has_v6 = false
       for (const sub of this.subnets) {
-        if (sub.type === '4') {
-          this.has_v4 = true
-        } else {
-          this.has_v6 = true
-        }
+        this.has_v4 = sub.type === '4'
+        this.has_v6 = sub.type === '6'
       }
       const recordQuery = await RangeService.getRecords(this.$store.state.netdb_axios_config, this.$route.params.name)
       this.fqdns = apiutil.dict_by_value_of_array(recordQuery.data[1], 'value')