Sync Item Master and Variant from shopify to erpnext error

[chafor]

erpnext_shopify.api.sync_shopify

Method: hourly, Handler: erpnext_shopify.api.sync_shopify
Traceback (innermost last):
File "/home/ubuntu/frappe-bench/apps/frappe/frappe/tasks.py", line 110, in scheduler_task
frappe.get_attr(handler)()
File "/home/ubuntu/frappe-bench/apps/erpnext_shopify/erpnext_shopify/api.py", line 25, in sync_shopify
sync_products(shopify_settings.price_list, shopify_settings.warehouse)
File "/home/ubuntu/frappe-bench/apps/erpnext_shopify/erpnext_shopify/sync_products.py", line 19, in sync_products
sync_shopify_items(warehouse, shopify_item_list)
File "/home/ubuntu/frappe-bench/apps/erpnext_shopify/erpnext_shopify/sync_products.py", line 24, in sync_shopify_items
make_item(warehouse, shopify_item, shopify_item_list)
File "/home/ubuntu/frappe-bench/apps/erpnext_shopify/erpnext_shopify/sync_products.py", line 30, in make_item
create_item(shopify_item, warehouse, 1, attributes, shopify_item_list=shopify_item_list)
File "/home/ubuntu/frappe-bench/apps/erpnext_shopify/erpnext_shopify/sync_products.py", line 123, in create_item
if not is_item_exists(item_dict, attributes):
File "/home/ubuntu/frappe-bench/apps/erpnext_shopify/erpnext_shopify/sync_products.py", line 251, in is_item_exists
item = frappe.get_doc("Item", {"item_name": shopify_item.get("item_name")})
File "/home/ubuntu/frappe-bench/apps/frappe/frappe/init.py", line 530, in get_doc
return frappe.model.document.get_doc(arg1, arg2)
File "/home/ubuntu/frappe-bench/apps/frappe/frappe/model/document.py", line 46, in get_doc
return controller(arg1, arg2)
File "/home/ubuntu/frappe-bench/apps/frappe/frappe/model/document.py", line 75, in init
frappe.throw(("{0} {1} not found").format((arg1), arg2), frappe.DoesNotExistError)
File "/home/ubuntu/frappe-bench/apps/frappe/frappe/init.py", line 262, in throw
msgprint(msg, raise_exception=exc)
File "/home/ubuntu/frappe-bench/apps/frappe/frappe/init.py", line 255, in msgprint
_raise_exception()
File "/home/ubuntu/frappe-bench/apps/frappe/frappe/init.py", line 240, in _raise_exception
raise raise_exception, encode(msg)
DoesNotExistError: Item {'item_name': u'Acme Coaches Glove Whistle 246-585'} not found


The trouble appeared to be when the Item inside shopify is the master of several variant. I know erpnext support variant.