I am running the following code to create a vertex map tag on an object (targetObject is a sphere BaseObject every time I call the function):

# Make object editable
res = c4d.utils.SendModelingCommand(
		command = c4d.MCOMMAND_MAKEEDITABLE,
		list = [targetObject],
		mode = c4d.MODELINGCOMMANDMODE_ALL,
		doc = doc )

if res is False or res is True:
	raise TypeError()
elif isinstance( res, list ):
	doc.InsertObject( res[0] )

vertexMapTag = res[0].GetTag( c4d.Tvertexmap )
if vertexMapTag is None:
	vertexMapTag = c4d.BaseTag( c4d.Tvertexmap )
	vertexMapTag[c4d.ID_TAGFIELD_ENABLE] = True
	vertexMapTag[c4d.ID_TAGFIELD_INVERT] = False
	vertexMapTag[c4d.ID_TAGFIELD_DEFORMED] = False
	res[0].InsertTag( vertexMapTag )
c4d.EventAdd()

After running this I get a sphere with a UVW tag and a vertex map tag, as intended. However, when I select the sphere and select the paint tool, I get the following error:

What is causing the tag to not be in sync?

Thank you for your help,
Daniel