Pre-requisite vs prerequisite
Solution 1:
In short, prefixes with a hypen, e.g. "pre-" should be avoided unless it will not be clear to the reader what the word is. This is even more the case if there is an existing word so, in your case, "pre-requisite" should not be used.
Interconnection -- not Inter-connection;
Pre-workout -- not Preworkout
Prerequisite -- not Pre-requisite
Multitask -- not Multi-task
Polymath -- not Poly-math
Multi-answer -- not Multianswer
Transboundary -- not Trans-boundary