Iteritems in python 3

I had everything working in the upgrade to python 3 going well then for some reason I started getting this error

#   File "C:\Users\~~\AppData\Roaming\Shotgun\bundle_cache\app_store\tk-multi-workfiles2\v0.13.1\python\tk_multi_workfiles\", line 753, in _update_group_child_entity_items
#     for key, row in six.iteritems(current_entity_row_map)
# AttributeError: module 'tank_vendor.six' has no attribute 'iteritems' 

does anyone have any ideas?

I would like to stray away from using more custom toolkit apps to fix this

It seems there is an issue with tk-shotgunutils-framework v5.8.5 once I reverted everything bcak to v5.7.10 everything seems to be working fine again