Wrong logo in Facebook preview

Hi all,

when we try to share the homepage of our site on Facebook (or Instagram too, that’s the same) a big logo is shown as preview and it’s not possible to modify it.
I’ve already tried to modify it with the Yoast SEO option and, in the end, also to inspect it, finding its path, and deleting it both via FTP and in media folder directly on WordPress backend…nothing happens! This “ghost-big-logo” continue to be shown.

Any suggestions?
Thank you!

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