Is it possible to attach more than 1 incident as cause of a change and to fix problems

Is it possible to attach more than 1 incident as cause of a change and to fix problems

We sometimes need to attach more than one change as the cause of an incident - you can only link 1 change within an incident.    
Also we can only attach 1 change to a problem but we need to be able to attach more than one sometimes as 1 change might resolve multiple problems.
Why is this restricted?

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