TB-RK3399PRODS环境搭配问题

toybrick@debian10:~$ sudo pip3 install -i http://repo.rock-chips/pypi/simple/torch torch==1.6.0
Looking in indexes: http://repo.rock-chips/pypi/simple/torch, http://repo.rock-chips.com/pypi/simple
WARNING: The repository located at repo.rock-chips is not a trusted or secure host and is being ignored. If this repository is available via HTTPS we recommend you use HTTPS instead, otherwise you may silence this warning and allow it anyway with '--trusted-host repo.rock-chips'.
ERROR: Could not find a version that satisfies the requirement torch==1.6.0 (from versions: 1.2.0, 1.6.0a0+b31f58d)
ERROR: No matching distribution found for torch==1.6.0
WARNING: You are using pip version 20.0.2; however, version 21.0.1 is available.
You should consider upgrading via the '/usr/bin/python3 -m pip install --upgrade pip' command.
求大佬看看什么原因造成的