Fabrice,

> This database is on a Linux server which havn't be switched off or rebooted
> then I have had this error.
> I have just, for tests of something else, send some Inactive / active
> triggers queries...
> And suddenly I have had this error message.
>
> How could it happen ?

Each metadata update increments the table's metadata version counter,
which is limited to 256 versions if I'm not wrong. The counters are
reset only during the restore phase (it has been said that this needs
improvement).
Regards
--
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_/\/ando