Hi all,

I encountered an issue where I receive an error "Stock.move" error when creating a manufacturing order with by product. 

Objective:
What I wanted to do is when a chicken arrives, I can manufacture it into "chicken salad" and "chicken fillet". After some research, I found that it can be done by using the by product MRP function.

Problem:

I created the product, BOM and the manufacturing order. However, when I click produce in the manufacturing order, the following error occurred. I tried to start a new DB instance with no other plugin installed but problem still occurs. 

Really appreciate if the community can provide some assistance on solving the error. Thanks.

Environment: Bitnami Odoo 12.0-20181218
VM: Google Cloud Platform

Error Code:

Odoo Server Error

Traceback (most recent call last):
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/http.py", line 654, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/http.py", line 312, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/http.py", line 696, in dispatch
    result = self._call_function(**self.params)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/http.py", line 344, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/service/model.py", line 97, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/http.py", line 337, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/http.py", line 939, in __call__
    return self.method(*args, **kw)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/http.py", line 517, in response_wrap
    response = f(*args, **kw)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/addons/web/controllers/main.py", line 966, in call_button
    action = self._call_kw(model, method, args, {})
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/addons/web/controllers/main.py", line 954, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/api.py", line 749, in call_kw
    return _call_kw_multi(method, model, args, kwargs)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/api.py", line 736, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/addons/mrp/wizard/mrp_product_produce.py", line 65, in do_produce
    self.check_finished_move_lots()
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/addons/mrp_byproduct/models/mrp_production.py", line 85, in check_finished_move_lots
    return super(MrpProductProduce, self).check_finished_move_lots()
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/addons/mrp/wizard/mrp_product_produce.py", line 76, in check_finished_move_lots
    if produce_move and produce_move.product_id.tracking != 'none':
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/fields.py", line 968, in __get__
    record.ensure_one()
  File "/opt/bitnami/apps/odoo/lib/odoo-12.0.post20181218-py3.7.egg/odoo/models.py", line 4653, in ensure_one
    raise ValueError("Expected singleton: %s" % self)
ValueError: Expected singleton: stock.move(21, 24)