When you rename the SharePoint. The previous name of the SharePoint site doesn’t become available for reuse, rather it create a redirect link from the original site name to the new site name. Therefore if you want to reuse the original site name, redirect link needs to be removed. This procedures can only be done via PowerShell.
Connect to Powershell using the PS command below, replacing “tenantname” with the actual name of your SharePoint tenant.
Connect-SPOService -Url https://tenantname-admin.sharepoint.comThis provides the list of all the redirect URL’s that is redirecting from the original site name to the new site name.
Get-SPOSite -Template REDIRECTSITE#0Use the Remove-SPOSite command and provide the URL of the original site name to have it removed.
Remove-SPOSite -Identity https://tenantname.sharepoint.com/sites/original-sitename