Error in mysql syntax - leaveapplication table

Traceback (most recent call last):
File “/home/frappe/frappe-bench/apps/frappe/frappe/app.py”, line 61, in application
response = frappe.handler.handle()
File “/home/frappe/frappe-bench/apps/frappe/frappe/handler.py”, line 21, in handle
data = execute_cmd(cmd)
File “/home/frappe/frappe-bench/apps/frappe/frappe/handler.py”, line 56, in execute_cmd
return frappe.call(method, **frappe.form_dict)
File “/home/frappe/frappe-bench/apps/frappe/frappe/init.py”, line 1026, in call
return fn(*args, **newargs)
File “/home/frappe/frappe-bench/apps/erpnext/erpnext/hr/doctype/leave_application/leave_application.py”, line 486, in get_events
add_leaves(events, start, end, conditions)
File “/home/frappe/frappe-bench/apps/erpnext/erpnext/hr/doctype/leave_application/leave_application.py”, line 528, in add_leaves
for d in frappe.db.sql(query, {“start”:start, “end”: end}, as_dict=True):
File “/home/frappe/frappe-bench/apps/frappe/frappe/database.py”, line 199, in sql
self._cursor.execute(query, values)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 170, in execute
result = self._query(query)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 328, in _query
conn.query(q)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 517, in query
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 732, in _read_query_result
result.read()
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 1075, in read
first_packet = self.connection._read_packet()
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 684, in _read_packet
packet.check_error()
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/protocol.py”, line 220, in check_error
err.raise_mysql_exception(self._data)
File “/home/frappe/frappe-bench/env/local/lib/python2.7/site-packages/pymysql/err.py”, line 109, in raise_mysql_exception
raise errorclass(errno, errval)
ProgrammingError: (1064, u’You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ‘and ifnull(tabLeave Application.status, “”) != “Rejected”’ at line 6’)

After my update from ERPNEXT V8 to V11.I receive the following error.Kindly help me to solve this issue.