addon.json error: type isn't a supported type!

[MasterPatch]

So. i wanted to upload my gmod addon to workshop to test it but i come across a problem.

in my command prompt i get this error: addon.json error: type isn't a supported type!

in the addon.json:

{
	"title" : "CSGO howl m4a1",
	"type" : "Addon",
	"tags" : ["Fun"],
	"ignore" :
		[
			"*.psd",
			"*.vcpro",
			"*.svn"
		]
}

[Billy]

[URL="http://wiki.garrysmod.com/page/Workshop_Addon_Creation"]It's really obvious what the problem is. Do your research first...[/URL]

[Rubat]

Are you trying to reupload someone else's work? Because that's not allowed without explicit permission from original author.

As the error suggests, "Addon" is not a valid addon type. The "Addon" tag is added automatically. You can find a list of all available types on the wiki.