SqliteDatabase Data Change after Restoring Application From SavedInstance

hope your doing fine, i have a problem with my sqliteDatabase, i am Holding my Database in a Service always running in background, and i get it like this :

      public static SQLiteDatabase getPostsDatabase(){
      if(PostsDatabase == null){
            if(getAnAvailableContext() == null){  return null;  }
          PostsDbHelper = new PostsDBHelper(getAnAvailableContext());
          PostsDatabase = PostsDbHelper.getWritableDatabase();
      }
      return PostsDatabase;
  }

 public static Context getAnAvailableContext(){
      if(MainActivity.mainActivityInstance != null){
          return MainActivity.mainActivityInstance;
      }else if(getInstance() != null){
          return getInstance();
      }else{
          return LMApplication.getInstance().getApplicationContext();
      }
  }

it works fine for first timer, but when the applications is restored from saved instance , and context instances change , my data on the database has changed and are wrong, my question is Is the Context Change really the Problem ? and if its so , how can i have a presistent context ? i tried to use application context for creating it but no improvement !