[Dovecot] Question about corrupted mdbox file

Hello.

We are using mdbox 2.013 + zlib, without SIS. When I try doveadm force-resync on a user's mailbox I get the following:

doveadm(jmraya): Error: Corrupted dbox file /buzones/mydomain/0b/59/jmraya/storage/m.27 (around offset=22805024): Unexpected EOF while reading metadata header doveadm(jmraya): Warning: dbox: Copy of the broken file saved to /buzones/mydomain/0b/59/jmraya/storage/m.27.broken

Any advice about this?

Regards

Maria