Issue Redirecting Domain from GoDaddy to OVH Hosting and Problems with OVH Multisite Co

Hello everyone here's my situation, let me know if you need anymore precisions,

Current Situation:
I initially had my domain jajapower.com redirected to a Shopify store. Recently, I attempted to redirect jajapower.com to my OVH-hosted website.

Steps Taken:
* Followed OVH’s DNS configuration instructions and updated the DNS records on GoDaddy.
* Set the root folder in OVH’s multisite settings to "jaja" instead of "www".
* After these changes, the redirection did not work as expected.

Issue Encountered:
The website did not display properly after I set up the DNS and root folder. I suspect the issue was due to setting the root folder as "jaja" instead of the default "www".

Actions Taken to Revert:
* Reverted the domain jajapower.com to redirect to my Shopify store to ensure the domain displays something.
* Removed all the OVH-related DNS records from GoDaddy.

Current Problems:
I am unable to modify or remove the existing jajapower.com entry in OVH’s multisite settings.
I see both jajapower.com and www.jajapower.com in the multisite configuration and am confused about their roles and correct setup.

Questions and Assistance Needed:

1. How can I correctly remove or modify the jajapower.com entry in OVH’s multisite settings?
2. What is the correct procedure for setting up the domain and subdomain (www.jajapower.com) on OVH’s multisite?
3. Should I use www.jajapower.com instead of jajapower.com as the main entry, and how do these settings impact the DNS configuration?

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Thanks in advance for your time and your help!

R.