File "/trytond/modules/__init__.py", line 428, in load_modules
_load_modules()
File "/trytond/modules/__init__.py", line 396, in _load_modules
load_module_graph(graph, pool, lang)
File "/trytond/modules/__init__.py", line 223, in load_module_graph
classes = pool.setup(module)
File "/trytond/pool.py", line 225, in setup
cls.__setup__()
File "/trytond/modules/purchase/invoice.py", line 40, in __setup__
super(Invoice, cls).__setup__()
File "/trytond/modules/account_invoice/invoice.py", line 169, in __setup__
super(Invoice, cls).__setup__()
File "/trytond/model/workflow.py", line 14, in __setup__
super(Workflow, cls).__setup__()
File "/trytond/model/modelsql.py", line 39, in __setup__
super(ModelSQL, cls).__setup__()
File "/trytond/model/modelstorage.py", line 47, in __setup__
super(ModelStorage, cls).__setup__()
File "/trytond/model/modelview.py", line 101, in __setup__
super(ModelView, cls).__setup__()
File "/trytond/model/model.py", line 67, in __setup__
getattr(field, attribute) | function.depends)
TypeError: unsupported operand type(s) for |: 'list' and 'set'