How to unmarshal xml to map

I have xml:

<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<Environments>
  <Environment Name="A" URIPath="http://a.com" />
  <Environment Name="B" URIPath="http://b.com" />
</Environments>

I want to map this xml to Map where first element in the tuple will be Name so I could search by it. I have classes:

Env

@XmlRootElement(name = "Environments")
@XmlAccessorType(XmlAccessType.FIELD)
public class Env {

    String Name;
    String URIPath;

    public String getName() {
        return Name;
    }
    @XmlAttribute
    public void setName(String name) {
        Name = name;
    }

    public String getURIPath() {
        return URIPath;
    }
    @XmlAttribute
    public void setURIPath(String URIPath) {
        this.URIPath = URIPath;
    }
}

EnvMap

@XmlRootElement(name = "Environments")
@XmlAccessorType(XmlAccessType.FIELD)
public class EnvMap {

    public Map<String, Env> getEnvMap() {
        return envMap;
    }

    public void setEnvMap(Map<String, Env> envMap) {
        this.envMap = envMap;
    }

    private Map<String, Env> envMap = new HashMap<String, Env>();

}

App

...
JAXBContext jaxbContext = JAXBContext.newInstance(EnvMap.class);
            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
            envMap = (EnvMap) jaxbUnmarshaller.unmarshal( inputStream );

            for(String name : envMap.getEnvMap().keySet()){
                System.out.println(envMap.getEnvMap().get(name).getURIPath());
                System.out.println(envMap.getEnvMap().get(name).getURIPath());
            }
...

I am getting:

com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions
Class has two properties of the same name "URIPath"
    this problem is related to the following location:
        at public java.lang.String app.model.Env.getURIPath()
        at app.model.Env
        at private java.util.Map app.model.EnvMap.envMap
        at app.model.EnvMap
    this problem is related to the following location:
        at java.lang.String app.model.Env.URIPath
        at app.model.Env
        at private java.util.Map app.model.EnvMap.envMap
        at app.model.EnvMap

How to fix it?