How to force remove site if remove-spsite gives an error 0x80070003

https://peterheibrink.wordpress.com/2014/08/21/forcefully-delete-site-collection/

$siteUrl = “http://dms/case/P68430“
$site = get-spsite $siteUrl
$siteId = $site.Id
$siteDatabase = $site.ContentDatabase
$siteDatabase.ForceDeleteSite($siteId, $false, $false)