Can't override CreateShipmentIssue in SOOrderEntry

Your override must have the same declaration in terms of parameters.

This is how the override for CreateShipment looks (as of 24r1):

public delegate IEnumerable CreateShipmentDelegate(PXAdapter adapter, Nullable<DateTime> shipDate, Nullable<Int32> siteID, String operation);
[PXOverride]
public IEnumerable CreateShipment(PXAdapter adapter, Nullable<DateTime> shipDate, Nullable<Int32> siteID, String operation, CreateShipmentDelegate baseMethod)
{
  //code to run before base code goes here
  return baseMethod(adapter, shipDate, siteID, operation);
  //code to run after base code goes here
}