Using Jackson and Lombok, is there way to map json fields to static variables

I have to read the JSON file and inject environment property as a static variable.
Here is the JSON

{
 "env":"staging",
 "index": "test",
 "indval": "testVal"
 
}

I need to map only env field as static string variable in my Class using Jackson and Lombok

@Data
public class PubConf {

   public static String env;
   private String index;
   private String indval;

}

I always getting below error for the above class

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "env"

Appreciate your thoughts for resolving this

@Data
public class PubConf {

   private String env;
   private String index;
   private String indval;
 
    @JsonIgnore
    public static String statEnv;

    public void setEnv(String env) {
        PubConf.statEnv= env;
    }
}

Source: https://www.baeldung.com/spring-inject-static-field