[Wikidata] Why is impossible to connect interwikis?

I would connect this article: https://it.wikipedia.org/wiki/Lista_nera_(economia) with this item: https://www.wikidata.org/wiki/Q607466 but I receive an error from the Italian interwiki and a message that I don't have the rights to do it if I would update it directly in Wikidata. It seems to me strange because I usually did it for other items. The message itself is not so much clear. Is there something that I can do to update this interwiki? -- Ilario Valdelli Wikimedia CH Verein zur Förderung Freien Wissens Association pour l’avancement des connaissances libre Associazione per il sostegno alla conoscenza libera Switzerland - 8008 Zürich Tel: +41764821371 http://www.wikimedia.ch --- Questa e-mail è stata controllata per individuare virus con Avast antivirus. https://www.avast.com/antivirus