Remove duplicate words or patterns inside lines

I have this type of file (plain text) :

sometext *sometext* @me &project1 *@me*
&project2 sometext *&project2* @john @me
something @john &project2
sometext #1 @me something else *#1*

and I would like to remove all inside-a-line duplicates so as to obtain :

sometext @me &project1
sometext &project2 @john @me
something @john &project2
sometext #1 @me something else

btw, the order of items (sometext, #, @ or &) do not matter, as long as they
are unique per line

Is it possible to do that ? This is for me out of reach...



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