Keybase git "unknown error: fatal: detected dubious ownership in repository at '.git'" for shared repository

[figachek]

Hello,
we have shared repo for group "icinga" with permissions:
drwxrwsr-x 9 root icinga 4096 Nov 4 08:24 .git

when i try to push to remote repository, i have a error:
[master 75eac40] test 1 file changed, 1 insertion(+) Initializing Keybase... done. Syncing with Keybase... done. To keybase://team/brightpatt/Icinga2 ! [remote rejected] master -> master (unknown error: fatal: detected dubious ownership in repository at '.git') error: failed to push some refs to 'keybase://team/brightpatt/Icinga2'
I'm a member of "icinga" group
id nikita.yurkov uid=1008(nikita.yurkov) gid=1008(nikita.yurkov) groups=1008(nikita.yurkov),992(sudo),989(icinga)
and i set
git config --global --add safe.directory /etc/icinga2

my log id: d22eb8b7f263549c6754151c