License transfer from v18 to v20

[nazaret]

I have v18 3CX PRO 4 SC which will expire June 2026, it is hosted on AWS
I have installed v20 Lightsail but it is 3CX PRO 8 SC and the trial will expire Sep 29
I have finished with v20 setup and it is now live.
No option to downgrade to 4 SC, if I just replace the license key will it be downgraded automatically?
Should I first delete v18 and then replace the v20 license?

 

[Charles_3CX]

Please use the provided form to contact the relevant department in 3CX to request further information.

 

[nazaret]

Please use the provided form to contact the relevant department in 3CX to request further information.

Thanks Charles, can you please clarify what you mean by "the provided form"?

 

[Charles_3CX]

Apologies, the form is found here: https://www.3cx.com/contact/