Can't read private messages, some posts missing

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Can't read private messages, some posts missing
by on (#47465)
When I try to read my private messages, I get this:
Code:
Could not update private message new/read status (2) for user

DEBUG MODE

SQL Error : 144 Table './nesdev_phpbb/phpbb_privmsgs' is marked as crashed and last (automatic?) repair failed

Line : 1863
File : privmsg.php

I was getting a similar error when trying to read some threads last night. I no longer get the error, but those threads seem to be missing some posts now.