Missing relation between Structcutoutcontour object and openingtype object.
An Opening has no relation to an OpeningType object which defines some particular properties for the Opening; for example, Cutting Limit.
Copying/Pasting an Opening.
At edit time, an Opening which does not go through all of the structure on which it is applied will not have the correct Cutting Limit value ("Through All" instead of "User Defined").
What You Should Do
Use the Clean command to apply the repair script.