Not so fast.
“Issued” is a property that supports setting the param value.
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
items = UnwrapElement(IN[0])
issued = IN[1]
TransactionManager.Instance.EnsureInTransaction(doc)
for item in items:
item.Issued = issued
TransactionManager.Instance.TransactionTaskDone()
OUT = items