OpenWrt shadow-user delete

Hello Community,

I'm a beginner of OpenWrt and follow a instruction of the first steps to make OpenWrt secure. There i should create a non-privileges user for to installations as root, sofar so good. Since i do this and want to install other thinks i get this output:

collected errors:

  • check_data_file_clashes: Package libubox20191228 wants to install file /lib/ but that file is already provided by package * libubox20170601
  • opkg_install_cmd: Cannot install package luci-ssl-nginx.

cmd is my shadow-user that i had create earlier. My question is, how i can delete this user or how i can install new packages with root even if the user cmd is in the system?

best regards,