AttributeError: 'LeaveApplication' object has no attribute 'employee_name'

Traceback (most recent call last):
File “/usr/lib/python2.7/runpy.py”, line 174, in _run_module_as_main
main”, fname, loader, pkg_name)
File “/usr/lib/python2.7/runpy.py”, line 72, in _run_code
exec code in run_globals
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/utils/bench_helper.py”, line 97, in
main()
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/utils/bench_helper.py”, line 18, in main
click.Group(commands=commands)(prog_name=‘bench’)
File “/home/vyasaka/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 764, in call
return self.main(*args, **kwargs)
File “/home/vyasaka/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 717, in main
rv = self.invoke(ctx)
File “/home/vyasaka/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/vyasaka/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/vyasaka/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File “/home/vyasaka/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 555, in invoke
return callback(*args, **kwargs)
File “/home/vyasaka/frappe-bench/env/local/lib/python2.7/site-packages/click/decorators.py”, line 17, in new_func
return f(get_current_context(), *args, **kwargs)
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/commands/init.py”, line 25, in _func
ret = f(frappe._dict(ctx.obj), *args, **kwargs)
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/commands/site.py”, line 233, in migrate
migrate(context.verbose, rebuild_website=rebuild_website, skip_failing=skip_failing)
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/migrate.py”, line 48, in migrate
frappe.modules.patch_handler.run_all(skip_failing)
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/modules/patch_handler.py”, line 41, in run_all
run_patch(patch)
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/modules/patch_handler.py”, line 30, in run_patch
if not run_single(patchmodule = patch):
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/modules/patch_handler.py”, line 71, in run_single
return execute_patch(patchmodule, method, methodargs)
File “/home/vyasaka/frappe-bench/apps/frappe/frappe/modules/patch_handler.py”, line 91, in execute_patch
frappe.get_attr(patchmodule.split()[0] + “.execute”)()
File “/home/vyasaka/frappe-bench/apps/erpnext/erpnext/patches/v12_0/generate_leave_ledger_entries.py”, line 22, in execute
generate_application_leave_ledger_entries()
File “/home/vyasaka/frappe-bench/apps/erpnext/erpnext/patches/v12_0/generate_leave_ledger_entries.py”, line 50, in generate_application_leave_ledger_entries
frappe.get_doc(application).create_leave_ledger_entry()
File “/home/vyasaka/frappe-bench/apps/erpnext/erpnext/hr/doctype/leave_application/leave_application.py”, line 368, in create_leave_ledger_entry
create_leave_ledger_entry(self, args, submit)
File “/home/vyasaka/frappe-bench/apps/erpnext/erpnext/hr/doctype/leave_ledger_entry/leave_ledger_entry.py”, line 44, in create_leave_ledger_entry
employee_name=ref_doc.employee_name,
AttributeError: ‘LeaveApplication’ object has no attribute ‘employee_name’