Duplicate - see T4702 instead

I won't fix it. In fact it can't anyway be completely fixed because gpg has code to make sure that a new key is at least one second newer than the previous generated.

It has now been implemented for all types of symmetric encryption (not just -cs). To go into 2.2.21

The first, I guess. The problem is that you are technical capable of _decryption_ but gpg does not allow this because for some reasons the key is arbitrary limited to signing. A warning message should be printed in thus a case but decryption should succeed.

Or this (don't allow anon keys for different usage):

diff --git a/g10/pubkey-enc.c b/g10/pubkey-enc.c
index 14cbdbb0f..b8d4059cd 100644
--- a/g10/pubkey-enc.c
+++ b/g10/pubkey-enc.c
@@ -91,9 +91,6 @@ get_session_key (ctrl_t ctrl, struct pubkey_enc_list *list, DEK *dek)
       if (err)
         break;

Do you mean something like this?

Fixed in rM1b840a151ad7: python: Fix how to generate documentation..

It's in master (to be gnupg 2.3).
Enjoy.

The qualitybar has now been removed from 2.2 and master.