amavis-new terminates because of error "(!)Amavisd::END: DB unregistering failed:"

[Zerony Zhao]

Hello everyone,

Recently amavis-new frequently stops because the error below:

(!)Amavisd::END: DB unregistering failed:


I searched online, I could not any clues. What causes the problem, and how
should I solve the issue?

Thank you in advance.