[Dovecot] How to recover sieve files?

I'm seeing a lot of these messages in my log files...

deliver(...): Aug 10 15:18:34 Error: sieve_execute_bytecode(.../.dovecot.sievec) failed

I'm guessing the file needs to be updated/recreated, but what's the "correct" way to do it? should I just remove the existing one and let the server recreate it?

Thanks,

david