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How to filter a collection list on a duplicated page without changing it on the original page

I duplicated a page containing a Collection list and I need to filter it but when applying the filter, it applies on the original page. There must be an easier path than recreating the whole list ?

Here is my public share link: LINK
(how to access public share link)

I tested a copy paste of a collection list to a new page, applied a filter to the new page and it did not affect the original. Maybe try that.