pabloem commented on a change in pull request #12761:
URL: https://github.com/apache/beam/pull/12761#discussion_r483216683



##########
File path: sdks/python/apache_beam/io/gcp/bigquery_file_loads.py
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@@ -356,8 +359,13 @@ def process(self, element, job_name_prefix=None):
       copy_from_reference.projectId = vp.RuntimeValueProvider.get_value(
           'project', str, '')
 
-    copy_job_name = '%s_%s' % (
+    copy_job_name = '%s_%s_%s' % (
         job_name_prefix,
+        _bq_uuid(
+            '%s:%s.%s' % (

Review comment:
       I've made the change, and added a smallmodification to a test that 
reproduces this issue.




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