VACUUM Error?

Hello,

I executed a Vacuum on my Postgres database.
You can see the command line : /vacuumdb -f -z -v -d ccm > /tmp/vacuum.txt
2> /tmp/vacuumError.txt I used performed the vacuum.

But I had error :"ERROR: Parent tuple was not found
vacuumdb: vacuum ccm failed"
each time I am executed the vacuum

have you any idea about this error? And may be any solution ?

Thanks in advance,

best regard,

Fabrice
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