To revert the file so that it's no longer included in the pending changelist you're trying to submit, use the full path:
p4 revert //dvt/v20/dev/main/test/gui/selenium_tests/playback/cfg_files/file1.cfg
If you instead want to delete the cfg_files
symlink that conflicts with the directory you're trying to add, do:
p4 delete //dvt/v20/dev/main/test/gui/selenium_tests/playback/cfg_files
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