I have a plan that is a 3% safe harbor and a cross tested profit sharing (each person is in their own group). There is a last day and 1000 hours requirement for the profit-sharing allocation. This is a 12/31/2023 plan year end. Can I do an amendment in 2024 to take out the last day and 1,000 hours requirement for the 12/31/2023 plan year by the end of 12/31/2024?