我有一台运行了一年多的 ipa 服务器。最近，当我尝试通过 https 或终端添加新用户时，它失败并显示以下错误消息。
IPA-Fehler 4203: DatabaseError
Server is unwilling to perform: Managed Entry Plugin rejected add operation (see errors log).
在错误日志中，我看到：
[timestamp] [:warn] [pid 2731] [client xxx] failed to set perms (3140) on file (/var/run/ipa/ccaches/user@xxx)!, referer: xxx
[timestamp] [:error] [pid 2727] ipa: INFO: [jsonserver_session] user@xxx: group_find(None, posix=True, version=u'2.230', no_members=True): SUCCESS
[timestamp] [:warn] [pid 2731] [client xxx] failed to set perms (3140) on file (/var/run/ipa/ccaches/user@xxx)!, referer: xxx
[timestamp] [:error] [pid 2726] ipa: INFO: [jsonserver_session] user@xxx: user_add(u'xxx', givenname=u'xxx', sn=u'xxx', userpassword=u'********', version=u'2.230'): DatabaseError
未创建用户，但我必须按照此处所述删除托管组： https ://www.redhat.com/archives/freeipa-users/2016-August/msg00092.html ，然后我才能重试。到底是怎么回事？任何帮助表示赞赏。
$ cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
$ ipa --version
VERSION: 4.6.4, API_VERSION: 2.230