Dear site admins,
We believe the "error on rename" problem (reported by several sites) is
due to a MySQL bug or problem.
Dropping a foreign key, and re-creating it seems to be enough to get rid
of this error, and have the migration script run fine.
Please check this page for more details:
https://twiki.cern.ch/twiki/bin/view/LCG/DpmSrmv2Support
Thanks to all admins for their help on this issue.
Cheers, Sophie.
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