Inadvertently Created Content Type Column and now can't delete it

Question

I created a column on my root site's content type and now cannot delete it. It is somehow locked as "Read Only" and I have tried PowerShell and SharePoint Designer 2010 and every option I could find to no avail. This is on our top level site and I am afraid this additional "Name" column could conflict with other fields and will cause problems down the road. I cannot delete the whole content type because this is a live site with hundreds of lists associated with it.

Any help or advice would be greatly appreciated!

Answer 1

Here is the poowershell script to delete the Column from Content Type.

#Attach to the web and content type
$web = Get-SPWeb http://portal
$ct = $web.ContentTypes["Sales Document"]

#Get link to the columnn from the web
$spFieldLink = New-Object Microsoft.SharePoint.SPFieldLink ($web.Fields["Aliases"])

#Remove the column from the content type and update
$ct.FieldLinks.Delete($spFieldLink.Id)
$ct.Update()

#Dispose of the web object
$web.Dispose()

http://get-spscripts.com/2010/10/cant-remove-site-column-from-content.html

Note. Always Test it in Dev Farm or site 1st.