[Dovecot] can I hide or delete the message "don't delete this message -- folder internal data" ?

sorry for my english... is possible that i can hide or delete the message "don't delete this message -- folder internal data" ?

this message is see from all accounts of my mail server.

i have a system with: Fedora Core 4 dovecot-0.99.14-4.fc4 sendmail-8.13.4-2

thanks

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