为什么 docker 切换网络模式为 bridge 会启动失败？

一开始是以 host 创建的容器，后来想切换成 bridge

命令：

docker network connect bridge ubuntu20
docker container start ubuntu

报错： Error response from daemon: failed to add interface veth4569079 to sandbox: error setting interface "veth4569079" IP to 172.17.0.3/16: cannot program address 172.17.0.3/16 in sandbox interface because it conflicts with existing route {Ifindex: 16 Dst: 172.17.0.0/16 Src: 172.17.0.1 Gw: <nil> Flags: [] Table: 254} Error: failed to start containers: ubuntu20

但是换回 host 之后又能正常启动

用--network bridge新创建的容器，inspect 查看配置由网关，而 host->bridge 的容器却没看到有网关的信息