The short answer is no (well no simple way without coding or trickery)
Hyperlinks do not depend on the slide number or name but on the Slide ID which is a unique number that is not visible to the normal user.
The problem is that this number is only unique within a given presentation. When you combine two or more presentations there will initially be duplicates and PPT will "fix" this by changing some of the IDs - almost certainly breaking your hyperlinks.
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