openGauss pre-installation environment error, error information see details, how to answer?

[GAUSS-51400] : Failed to execute the command: python3 '/soft/openGauss/script/local/PreInstallUtility.py' -t create_cluster_paths -u omm -g dbgrp -X '/soft/openGauss/clusterconfig.xml' -l '/gaussdb/log/omm/om/gs_local.log'.Error: [GAUSS-50202] : The /gaussdb must be empty. Or user [omm] has write permission to directory /gaussdb. Because it will create symbolic link [/gaussdb/app] to install path [/gaussdb/app_78689da9] in gs_install process with this user.