When using the import-to-aur4.sh script provided at https://github.com/ido/packages-archlinux/blob/master/bin/import-to-aur4.sh , I saw a few packages fail with the following error:

Counting objects: 7, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (7/7), done.
Writing objects: 100% (7/7), 1.83 KiB | 0 bytes/s, done.
Total 7 (delta 0), reused 1 (delta 0)
remote: Traceback (most recent call last):
remote: File "hooks/update", line 271, in <module>
remote: save_srcinfo(srcinfo, db, cur, user)
remote: File "hooks/update", line 148, in save_srcinfo
remote: "VALUES (%s, %s)", [pkgbase_id, user_id])
remote: File "/usr/lib/python3.4/site-packages/mysql/connector/cursor.py", line 507, in execute
remote: self._handle_result(self._connection.cmd_query(stmt))
remote: File "/usr/lib/python3.4/site-packages/mysql/connector/connection.py", line 722, in cmd_query
remote: result = self._handle_result(self._send_cmd(ServerCmd.QUERY, query))
remote: File "/usr/lib/python3.4/site-packages/mysql/connector/connection.py", line 640, in _handle_result
remote: raise errors.get_exception(packet)
remote: mysql.connector.errors.IntegrityError: 1062 (23000): Duplicate entry '17572-69805' for key 'NotifyUserIDPkgID'
remote: error: hook declined to update refs/heads/master
To ssh+git://aur@aur-dev.archlinux.org:/pypy-virtualenv.git/
! [remote rejected] aur4/pypy-virtualenv -> master (hook declined)


However, a second run was successful and did not produce this error.