Error while submitting job card

Traceback (most recent call last):
File “/opt/bench/erpnext/apps/frappe/frappe/desk/form/save.py”, line 19, in savedocs
doc.submit()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 856, in submit
self._submit()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 845, in _submit
self.save()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 259, in save
return self._save(*args, **kwargs)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 312, in _save
self.run_post_save_methods()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 918, in run_post_save_methods
self.run_method(“on_submit”)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 780, in run_method
out = Document.hook(fn)(self, *args, **kwargs)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 1058, in composer
return composed(self, method, *args, **kwargs)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 1041, in runner
add_to_return_value(self, fn(self, *args, **kwargs))
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 774, in
fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
File “/opt/bench/erpnext/apps/erpnext/erpnext/manufacturing/doctype/job_card/job_card.py”, line 72, in on_submit
self.set_transferred_qty()
File “/opt/bench/erpnext/apps/erpnext/erpnext/manufacturing/doctype/job_card/job_card.py”, line 115, in set_transferred_qty
self.db_set(“transferred_qty”, self.transferred_qty)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 990, in db_set
self.modified, self.modified_by, update_modified=update_modified)
File “/opt/bench/erpnext/apps/frappe/frappe/database/database.py”, line 634, in set_value
values, debug=debug)
File “/opt/bench/erpnext/apps/frappe/frappe/database/database.py”, line 154, in sql
self._cursor.execute(query, values)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 170, in execute
result = self._query(query)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 328, in _query
conn.query(q)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 516, in query
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 727, in _read_query_result
result.read()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 1066, in read
first_packet = self.connection._read_packet()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 683, in _read_packet
packet.check_error()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/protocol.py”, line 220, in check_error
err.raise_mysql_exception(self._data)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/err.py”, line 109, in raise_mysql_exception
raise errorclass(errno, errval)
IntegrityError: (1048, u"Column ‘transferred_qty’ cannot be null")

Traceback (most recent call last):
File “/opt/bench/erpnext/apps/frappe/frappe/app.py”, line 55, in application
response = frappe.handler.handle()
File “/opt/bench/erpnext/apps/frappe/frappe/handler.py”, line 20, 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 1007, in call
return fn(*args, **newargs)
File “/opt/bench/erpnext/apps/frappe/frappe/desk/form/save.py”, line 19, in savedocs
doc.submit()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 856, in submit
self._submit()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 845, in _submit
self.save()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 259, in save
return self._save(*args, **kwargs)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 312, in _save
self.run_post_save_methods()
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 918, in run_post_save_methods
self.run_method(“on_submit”)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 780, in run_method
out = Document.hook(fn)(self, *args, **kwargs)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 1058, in composer
return composed(self, method, *args, **kwargs)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 1041, in runner
add_to_return_value(self, fn(self, *args, **kwargs))
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 774, in
fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
File “/opt/bench/erpnext/apps/erpnext/erpnext/manufacturing/doctype/job_card/job_card.py”, line 72, in on_submit
self.set_transferred_qty()
File “/opt/bench/erpnext/apps/erpnext/erpnext/manufacturing/doctype/job_card/job_card.py”, line 115, in set_transferred_qty
self.db_set(“transferred_qty”, self.transferred_qty)
File “/opt/bench/erpnext/apps/frappe/frappe/model/document.py”, line 990, in db_set
self.modified, self.modified_by, update_modified=update_modified)
File “/opt/bench/erpnext/apps/frappe/frappe/database/database.py”, line 634, in set_value
values, debug=debug)
File “/opt/bench/erpnext/apps/frappe/frappe/database/database.py”, line 154, in sql
self._cursor.execute(query, values)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 170, in execute
result = self._query(query)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 328, in _query
conn.query(q)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 516, in query
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 727, in _read_query_result
result.read()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 1066, in read
first_packet = self.connection._read_packet()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 683, in _read_packet
packet.check_error()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/protocol.py”, line 220, in check_error
err.raise_mysql_exception(self._data)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/err.py”, line 109, in raise_mysql_exception
raise errorclass(errno, errval)
IntegrityError: (1048, u"Column ‘transferred_qty’ cannot be null")