Successful Upload to S3 but error on /system/ajax

I’m trying to use S3 CORS for my project and I’m encountering the error below:

An AJAX HTTP request terminated abnormally.
Debugging information follows.
Pagh: /system/ajax
StatusTest: n/a
Error message
Warning: filesize(): stat failed for s3://file-name.txt in file_save() (line 605 of /srv/bindings/ 8583c5f5083a475a9d644d64d843b077/code/includes/
PDOException: SQLSTATE[2300]: Integrity constraint violation: 1062 Duplicate entry ‘s3://file-name.txt’ for key ‘uri’: INSERT INTO {file_managed} (uid, filename, uri, filemie, filesize, status, timestamp, type) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7); Array(
[:db_insert_placeholder_0] = > 1
[:db_insert_placeholder_1] = > file-name.txt
[:db_insert_placeholder_2] = > s3://file-name.txt
[:db_insert_placeholder_3] = > text/plain
[:db_insert_placeholder_4] = > 0
[:db_insert_placeholder_5] = > 0
[:db_insert_placeholder_6] = > 1398930781
[:db_insert_placeholder_7] = > default
in drupal_write_record() (line 7211 of /srv/bindings/8583c5f5083a475a9d644d64d843b077/code/includes/

The website encountered an unexpected error. Please try again later.


Ready State: undefined


Below provided some of alternatives to check this error.

1. Insert the same filename into multiple times.
2. Cause of this issue can be having multiple CORS3 Upload fields on a single form.



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