AttributeError: 'ItemPrice' object has no attribute 'valid_from'

After a new update, when I create a new price for an item I get the following error

Traceback (most recent call last):
  File "/opt/bench/erpnext/apps/frappe/frappe/desk/form/save.py", line 22, in savedocs
    doc.save()
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 260, in save
    return self._save(*args, **kwargs)
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 283, in _save
    self.insert()
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 222, in insert
    self.run_before_save_methods()
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 869, in run_before_save_methods
    self.run_method("validate")
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 765, in run_method
    out = Document.hook(fn)(self, *args, **kwargs)
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 1040, in composer
    return composed(self, method, *args, **kwargs)
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 1023, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 759, in <lambda>
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/opt/bench/erpnext/apps/erpnext/erpnext/stock/doctype/item_price/item_price.py", line 19, in validate
    self.validate_dates()
  File "/opt/bench/erpnext/apps/erpnext/erpnext/stock/doctype/item_price/item_price.py", line 29, in validate_dates
    if self.valid_from and self.valid_upto:
AttributeError: 'ItemPrice' object has no attribute 'valid_from'

Traceback (most recent call last):
  File "/opt/bench/erpnext/apps/frappe/frappe/app.py", line 62, in application
    response = frappe.handler.handle()
  File "/opt/bench/erpnext/apps/frappe/frappe/handler.py", line 22, in handle
    data = execute_cmd(cmd)
  File "/opt/bench/erpnext/apps/frappe/frappe/handler.py", line 55, in execute_cmd
    return frappe.call(method, **frappe.form_dict)
  File "/opt/bench/erpnext/apps/frappe/frappe/__init__.py", line 957, in call
    return fn(*args, **newargs)
  File "/opt/bench/erpnext/apps/frappe/frappe/desk/form/save.py", line 22, in savedocs
    doc.save()
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 260, in save
    return self._save(*args, **kwargs)
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 283, in _save
    self.insert()
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 222, in insert
    self.run_before_save_methods()
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 869, in run_before_save_methods
    self.run_method("validate")
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 765, in run_method
    out = Document.hook(fn)(self, *args, **kwargs)
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 1040, in composer
    return composed(self, method, *args, **kwargs)
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 1023, in runner
    add_to_return_value(self, fn(self, *args, **kwargs))
  File "/opt/bench/erpnext/apps/frappe/frappe/model/document.py", line 759, in <lambda>
    fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
  File "/opt/bench/erpnext/apps/erpnext/erpnext/stock/doctype/item_price/item_price.py", line 19, in validate
    self.validate_dates()
  File "/opt/bench/erpnext/apps/erpnext/erpnext/stock/doctype/item_price/item_price.py", line 29, in validate_dates
    if self.valid_from and self.valid_upto:
AttributeError: 'ItemPrice' object has no attribute 'valid_from'

It solved by pull