Bench migrate error - may be due to custom app

Hi,
When I’m executing bench migrate, the below error is being thrown. I’ve executed it after running bench update.

Migrating site1.local
Executing erpnext.patches.v10_0.added_extra_gst_custom_field_in_gstr2 #2018-02-13 in site1.local (1bd3e0294da19198)
Success
Executing erpnext.patches.v10_0.set_b2c_limit in site1.local (1bd3e0294da19198)
Success
Updating DocTypes for frappe : [========================================]
Updating DocTypes for erpnext : [========================================]
Updating DocTypes for erpnext_shopify: [========================================]
Updating DocTypes for erpnext_ebay : [========================================]
Updating DocTypes for erpnext_ebaytwo: [========================================]
Updating DocTypes for erpnext_mobile_addons: [========================================]
Updating DocTypes for pygapi : [========================================]
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/vamc/frappe-bench/apps/frappe/frappe/utils/bench_helper.py”, line 94, in
main()
File “/home/vamc/frappe-bench/apps/frappe/frappe/utils/bench_helper.py”, line 18, in main
click.Group(commands=commands)(prog_name=‘bench’)
File “/home/vamc/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 722, in call
return self.main(*args, **kwargs)
File “/home/vamc/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 697, in main
rv = self.invoke(ctx)
File “/home/vamc/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/vamc/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File “/home/vamc/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File “/home/vamc/frappe-bench/env/local/lib/python2.7/site-packages/click/core.py”, line 535, in invoke
return callback(*args, **kwargs)
File “/home/vamc/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/vamc/frappe-bench/apps/frappe/frappe/commands/init.py”, line 24, in _func
ret = f(frappe.dict(ctx.obj), *args, **kwargs)
File “/home/vamc/frappe-bench/apps/frappe/frappe/commands/site.py”, line 222, in migrate
migrate(context.verbose, rebuild_website=rebuild_website)
File “/home/vamc/frappe-bench/apps/frappe/frappe/migrate.py”, line 35, in migrate
sync_fixtures()
File “/home/vamc/frappe-bench/apps/frappe/frappe/utils/fixtures.py”, line 24, in sync_fixtures
ignore_links=True, overwrite=True)
File “/home/vamc/frappe-bench/apps/frappe/frappe/core/doctype/data_import/data_import.py”, line 53, in import_doc
frappe.modules.import_file.import_file_by_path(f, data_import=True, force=True, pre_process=pre_process, reset_permissions=True)
File “/home/vamc/frappe-bench/apps/frappe/frappe/modules/import_file.py”, line 58, in import_file_by_path
ignore_version=ignore_version, reset_permissions=reset_permissions)
File “/home/vamc/frappe-bench/apps/frappe/frappe/modules/import_file.py”, line 132, in import_doc
doc.insert()
File “/home/vamc/frappe-bench/apps/frappe/frappe/model/document.py”, line 245, in insert
self.run_post_save_methods()
File “/home/vamc/frappe-bench/apps/frappe/frappe/model/document.py”, line 887, in run_post_save_methods
self.run_method(“on_update”)
File “/home/vamc/frappe-bench/apps/frappe/frappe/model/document.py”, line 755, in run_method
out = Document.hook(fn)(self, *args, **kwargs)
File “/home/vamc/frappe-bench/apps/frappe/frappe/model/document.py”, line 1024, in composer
return composed(self, method, *args, **kwargs)
File “/home/vamc/frappe-bench/apps/frappe/frappe/model/document.py”, line 1007, in runner
add_to_return_value(self, fn(self, *args, **kwargs))
File “/home/vamc/frappe-bench/apps/frappe/frappe/model/document.py”, line 749, in
fn = lambda self, *args, **kwargs: getattr(self, method)(*args, **kwargs)
File “/home/vamc/frappe-bench/apps/frappe/frappe/custom/doctype/custom_field/custom_field.py”, line 51, in on_update
validate_fields_for_doctype(self.dt)
File “/home/vamc/frappe-bench/apps/frappe/frappe/core/doctype/doctype/doctype.py”, line 394, in validate_fields_for_doctype
validate_fields(frappe.get_meta(doctype, cached=False))
File “/home/vamc/frappe-bench/apps/frappe/frappe/core/doctype/doctype/doctype.py”, line 638, in validate_fields
check_hidden_and_mandatory(d)
File “/home/vamc/frappe-bench/apps/frappe/frappe/core/doctype/doctype/doctype.py”, line 447, in check_hidden_and_mandatory
frappe.throw(
(“Field {0} in row {1} cannot be hidden and mandatory without default”).format(d.label, d.idx))
File “/home/vamc/frappe-bench/apps/frappe/frappe/init.py”, line 323, in throw
msgprint(msg, raise_exception=exc, title=title, indicator=‘red’)
File “/home/vamc/frappe-bench/apps/frappe/frappe/init.py”, line 309, in msgprint
_raise_exception()
File “/home/vamc/frappe-bench/apps/frappe/frappe/init.py”, line 282, in _raise_exception
raise raise_exception(encode(msg))
frappe.exceptions.ValidationError: Field Parameter in row 1 cannot be hidden and mandatory without default

We have a custom app installed. How to know where the issue is occurring exactly?

We are using the below versions

Frappe Framework: v10.1.0 (master)
ERPNext: v10.1.0 (master)

Any help would be great.

you have added a field which is hidden and mandatory. Which is not allowed.