Thanks for asking Julien! If your vehicle was registered using Category E COE, you must renew its COE under the vehicle’s corresponding category A to D. Be sure to check the CC levels and renew for the right category.
Also, the best time to renew your COE is actually one month before the COE expiring month, so it's best for you to renew your COE in June. Any renewal done earlier will forfeit whatever number of valid months your COE has left.
If you require assistance with COE Renewal, Motorist can help you get a competitive bank loan and settle the necessary paperwork for you as well: https://www.motorist.sg/coe-renewal