Re registering a service already registered with a check deregisters the service

[XavM]

List existing services :

$> curl -sS 127.0.0.1:8500/v1/agent/services | jq .
{
"service1": {
"Port": 8080,
"Tags": [
"tag1"
],
"Service": "service1",
"ID": "service1"
}
}

Re register the service again,changing something or not, but including the existing check :

$> curl -X PUT 127.0.0.1:8500/v1/agent/service/register -d '
{
"Name": "service1",
"Tags": [
"tag2"
],
"Port": 8080,
"Check": {
"Script": "curl -sS localhost:8080/status",
"Interval": "60s"
}
}'
CheckID is already registered

List existing services :

$> curl -sS 127.0.0.1:8500/v1/agent/services | jq .
{}

---

I could understand that checkIDs must be unique and that the Re register fails, but the service should not be entirely deregistred, (I guess it should be left intact)