package com.growthbeat.model;

public class Error extends Model {

	private String message;
	private String domain;
	private Integer code;

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	public String getDomain() {
		return domain;
	}

	public void setDomain(String domain) {
		this.domain = domain;
	}

	public Integer getCode() {
		return code;
	}

	public void setCode(Integer code) {
		this.code = code;
	}

}

package com.growthbeat.model;

public class Error extends Model {

	private String message;
	private Integer code;

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	public Integer getCode() {
		return code;
	}

	public void setCode(Integer code) {
		this.code = code;
	}

}

Remove domain property from Error model