Using go-zookeeper api to create TTL Node always shows invalid arguments

Question

I am facing an issue while attempting to create a TTL node. During the execution of the corresponding function, I consistently encounter an "invalid arguments" error. I have ensured that my parameters align with the function definition, yet the error persists. Could it be that I am using the function incorrectly?

The api:

// CreateTTL creates a TTL znode, which will be automatically deleted by server after the TTL.
func (c *Conn) CreateTTL(path string, data []byte, flags int32, acl []ACL, ttl time.Duration) (string, error) {
    if err := validatePath(path, flags&FlagSequence == FlagSequence); err != nil {
        return "", err
    }
    if flags&FlagTTL != FlagTTL {
        return "", ErrInvalidFlags
    }

    res := &createResponse{}
    _, err := c.request(opCreateTTL, &CreateTTLRequest{path, data, acl, flags, ttl.Milliseconds()}, res, nil)
    return res.Path, err}

My code:

import "github.com/go-zookeeper/zk"
conn, _, err := zk.Connect( []string{"[***]:***"}, time.Second*5)
if err != nil {
     hlog.Errorf("[ZK] Connect returned error: %v", err)
}
res, err := conn.CreateTTL("/test", []byte("ttl node"), zk.FlagTTL, zk.WorldACL(zk.PermAll), time.Second)

I try to changed the ttl, path, data paramter and still return this error

Now it works well I changed my flags into zk.FlagTTL|zk.FlagEphemeral but why?