Zend certified PHP/Magento developer

Thunderbird keeps asking PGP key

Since this morning, Thunderbird keeps asking
«
Please enter the passphrase to unlock the openPGP secret key

»
in a popup every ~30 seconds.

I don’t really remember what I did to trigger that.
Now I want to disable the popup.

How to say Thunderbird that I don’t remember the passphrase and it should not ask me anymore?

In fact, the following “solved” the problem:

  • quit Thunderbird
  • rename the directory gnupg mv .gnupg bak_gnupg
  • restart Thunderbird
  • rename back mv bak_gnupg .gnupg
  • quit/restart Thunderbird ad lib

Does someone understand what happened ?

Maybe related: https://security.stackexchange.com/q/252007