SQLite-net-pcl - SQLite.SQLiteException: Cannot add a PRIMARY KEY column

Question

I seem to be hitting all sorts of problems today. I simply cannot get Sqlite-net-pcl to behave correctly when signing an APK. Debug and release work fine but everytime I create a signed version of the APK the app crashes with this issue:-

SQLite.SQLiteException: Cannot add a PRIMARY KEY column

Here is an example of my model:-

using SQLite.Net.Attributes;
using System;

namespace App.BusinessLayer.LocalObjects
{
[Preserve(AllMembers = true)]
public class LocalTip
{

public int ID { get; set; }

[PrimaryKey, Column("tipObjectId")]
public string objectId { get; set; }
public DateTime createdAt { get; set; }
public DateTime updatedAt { get; set; }
public string Title { get; set; }
public string Bet { get; set; }
public string Description { get; set; }
public string Rating { get; set; }
public string Time { get; set; }
public string Bookies { get; set; }
public string Url { get; set; }
public int Status { get; set; }
public Double Odds { get; set; }
public int Outcome { get; set; }

public LocalTip()
{
    this.objectId = " ";
    this.Title = " ";
    this.Bet = " ";
    this.Description = " ";
    this.Rating = " ";
    this.Time = " ";
    this.Bookies = " ";
    this.Url = " ";
}
}
}

Has anyone seen this before?