Property decorator with constant=True generates TypeError

PySide2 generates TypeError when use Property decorator with constant=True

TypeError: A constant property cannot have a WRITE method or a NOTIFY signal.

To reproduce - prepare the simple class:

class A(QObject):
    def __init__(self):
        QObject.__init__(self)
        self.val = str("")

when executing python script PySide2 generates TypeError for this code:

@Property(str, constant=True)
def variable(self):
     return self.val

However, when we transform the previous code into this:

def getVal(self):
    return self.val

variable = Property(str, getVal, constant=True)

It works.

In PySide 5.15.0 it all works fine but for version 5.15.1 and 5.15.2 the decorator example generates TypeError.