🚀 go-pugleaf

The keyIsDirty key is for the classDocument.
So i do something like this:

SPErr SetNotDirty()
{
        PIActionReference reference = NULL;
        PIActionDescriptor result = NULL;
        PIActionDescriptor desc = NULL;
        PIActionDescriptor document = NULL;
        DescriptorTypeID runtimeEventID;
        SPErr error = kSPNoError;

error = sPSActionDescriptor->Make(&desc);
        if(error)
        {
             goto returnError;
        }

error = sPSActionDescriptor->Make(&document);
         if(error)
         {
              goto returnError;
         }

error = sPSActionReference->Make(&reference);
         if(error)
         {
              goto returnError;
         }

error = sPSActionReference->PutProperty(reference, classProperty,
keyIsDirty);
          if(error)
         {
              goto returnError;
         }

error = sPSActionReference->PutEnumerated(
                 reference, classDocument, typeOrdinal, enumTarget );
         if(error)
         {
              goto returnError;
         }

error = sPSActionDescriptor->PutReference(desc, keyNull,
reference);
         if(error)
         {
          goto returnError;
         }

error = sPSActionDescriptor->PutBoolean(document, keyIsDirty,
false);
         if(error)
         {
              goto returnError;
         }

//Here I set the target for the action
//I also used keyTarget, keySource, keySource2, keyDocumentID
//and keyDocument - a key created by myself
        error = sPSActionDescriptor->PutObject(desc, keyTo, classDocument,
document);
         if(error)
         {
              goto returnError;
         }

//Here I play the event
//I also try to create a new event called eventSetDirty
         error = sPSActionControl->Play(&result, eventSet, desc,
plugInDialogSilent);
         if(error)
         {
              goto returnError;
         }

returnError:
//free all descriptors and references
 if (reference != NULL) sPSActionReference->Free(reference);
 if (result != NULL) sPSActionDescriptor->Free(result);
 if (desc != NULL) sPSActionDescriptor->Free(desc);

return error;
}

But I get an error code -25920 which is not documented, and I don't know what
this error is!?
One of my ideas is that the keyIsDirty can be read only, so I can not set a
value for it!?
Is there any way to change this value!?