AGT9501

Our company is transitioning from a SIMPLE to a 401K plan. Through a series of events by Fidelity, we were not able to start the plan on January 1 but instead have a live plan starting April 1. For a variety of reasons, we would like to keep the SIMPLE for the balance of 2020 and delay the start of the 401K until January 1, 2021. Fidelity seems to indicate this is not doable. Can a delay in starting a "live" plan be done reasonably?