3cx downgrade from V20 to V18

I have a 3cx problem where the customer had the system hosted on a OVH VPS. The server was deleted, fortunately I have a copy of V18.

Once the system was uploaded to Digital Ocean the system was automatically updated to V20 but with errors. Duplicate emails on extensions so now we cannot access the system.

Anyone with similar issues or answers?

Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

Sign In or Sign Up to Answer

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Site Moderator
Site Moderator badge
July 5, 2024


What I can suggest here as possible solution and good approach is to perform a clean installation of 3CX V20 on your Digital Ocean droplet. Once installed, restore your V18 backup to this fresh installation.

During the restore process, ensure that you select the option to keep the current configuration instead of applying the backup configuration directly. This can help mitigate compatibility issues.

Hope that this helps!

Site Moderator
Site Moderator badge
July 5, 2024


That’s a pickle. I’ve not had similar issues however what you can do is restore the V18 and see if the version will be updated to V20 again.

Additionally, It might be a better idea to contact the Developers of 3cx , they might be able to assist with a more detailed steps on how to resolve this.

Try DigitalOcean for free

Click below to sign up and get $200 of credit to try our products over 60 days!

Sign up

Featured on Community

Get our biweekly newsletter

Sign up for Infrastructure as a Newsletter.

Hollie's Hub for Good

Working on improving health and education, reducing inequality, and spurring economic growth? We'd like to help.

Become a contributor

Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.

Welcome to the developer cloud

DigitalOcean makes it simple to launch in the cloud and scale up as you grow — whether you're running one virtual machine or ten thousand.

Learn more
DigitalOcean Cloud Control Panel