error appears when commond "sudo miniccnx"

[gaoyanyu]

When I commond "sudo miniccnx",errors appears like this: “/usr/local/lib/python2.7/dist-packages/requests/init.py:80: RequestsDependencyWarning: urllib3 (1.22) or chardet (2.3.0) doesn't match a supported version!”.
,but network is created.When Adding metrics collectors ,it seems like this
"Host h1: database miniccnx_data already exists: appending data.
Host h2: database miniccnx_data already exists: appending data.
Host s1: database miniccnx_data already exists: appending data."
Idon't know how to handle this ,who can give me a hand?many thanks ! @Caio92 @carlosmscabral @chesteve