Why there is two deepstream directory created during installation

i have install deepstream 6.0 on jetson agx xavier
but when i look onto this location i got two directory

  1. deepstream
  2. deepstream-6.0

when i checked both has same files but when i clone deepstream-reference-app they give me this path for cloning config file

/opt/nvidia/deepstream/deepstream/samples/configs/tao_pretrained_models/

but why not we use use deepstream-6.0

/opt/nvidia/deepstream/deepstream-6.0/samples/configs/tao_pretrained_models/

so i removed deepstream folder then i run deepstream-reference -app

but this got me error

/opt/nvidia/deepstream/deepstream-6.0/samples/configs/tao_pretrained_models$ sudo deepstream-app -c  deepstream_app_source1_detection_models.txt 

Using winsys: x11 
gstnvtracker: Loading low-level lib at /opt/nvidia/deepstream/deepstream/lib/libnvds_nvmultiobjecttracker.so
gstnvtracker: Failed to open low-level lib at /opt/nvidia/deepstream/deepstream/lib/libnvds_nvmultiobjecttracker.so
 dlopen error: /opt/nvidia/deepstream/deepstream/lib/libnvds_nvmultiobjecttracker.so: cannot open shared object file: No such file or directory
gstnvtracker: Failed to initilaize low level lib.
** ERROR: <main:707>: Failed to set pipeline to PAUSED
Quitting
App run failed

what should i do how to clean uninstall deepstream and reinstall why the refrence app is not running without deepstream folder why cannot run from deepstream-6.0 folder ???

Moving this to the DeepStream SDK forum for visibility.

/opt/nvidia/deepstream/deepstream is a link to /opt/nvidia/deepstream/deepstream6.0, please keep it as it is.

Thanks @yingliu got it.