MediaWiki:Titleblacklist-custom-repeated-namespace-prefix

{{fmbox

| type = editnotice

| image = File:Ambox warning yellow.svg

| text = '''You appear to be trying to {{#ifexpr:{{NAMESPACENUMBER}} < 0

|create a page with (or move a page to) a title with a double-namespace prefix. This is likely a title naming error.

|{{#ifexist:{{PAGENAME}}|view|create}} :{{PAGENAME}} but are actually about to create :{{FULLPAGENAME}}'''

• If you are trying to {{#ifexist:{{PAGENAME}}|view|create}} :{{PAGENAME}}, just follow the {{#ifexist:{{PAGENAME}}||red}} link.}}
• If this is the page you want to create, please make a request at Wikipedia:Administrators' noticeboard.

}}