Error when creating item variants DuplicateEntryError

After last update we receive the following error when creating any item variant:

Traceback (most recent call last):
File “/home/frappe/frappe-bench/apps/frappe/frappe/utils/background_jobs.py”, line 95, in execute_job
method(**kwargs)
File “/home/frappe/frappe-bench/apps/erpnext/erpnext/controllers/item_variant.py”, line 190, in create_multiple_variants
variant.save()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 256, in save
return self._save(*args, **kwargs)
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 279, in _save
self.insert()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/document.py”, line 237, in insert
d.db_insert()
File “/home/frappe/frappe-bench/apps/frappe/frappe/model/base_document.py”, line 314, in db_insert
raise frappe.DuplicateEntryError(self.doctype, self.name, e)
DuplicateEntryError: (u’Item Variant Attribute’, ‘9048ffc0e5’, IntegrityError(1062, u"Duplicate entry ‘9048ffc0e5’ for key ‘PRIMARY’"))