Uipath doesnt work when certain path copied to other path

Several files related hoge program located under “\uipath” as followings;

“uipath\hoge\program\a.xaml”
“uipath\hoge\program\screenshots”
“uipath\hoge\common\common.xaml”
“uipath\hoge#backupfile#”

Actually #backupfile# are consists of the same files under uipath\hoge\program
to isolate as old ver like;
“uipath\hoge#backupfile#\20190201\a.xaml”
“uipath\hoge#backupfile#\20190201.screenshotsl”
“uipath\hoge#backupfile#\common\common.xaml”

Then I copied uipath\hoge#backupfile# to the path under the directory “uipath” like
“uipath#backupfile#”
without deleting original path “uipath\hoge#backupfile#” and found the hoge program doesnt
work with error mentioned as below;

4:21:29.7501 Error {“message”:“03/07/2019 14:21:29 01_xxreport\04_xxxx_Check error:System.UnauthorizedAccessException: Access to the path is denied.\r\n at UiPath.Core.Activities.InvokeWorkflowFile.EndExecute(AsyncCodeActivityContext context, IAsyncResult result)\r\n at System.Activities.AsyncCodeActivity.System.Activities.IAsyncCodeActivity.FinishExecution(AsyncCodeActivityContext context, IAsyncResult result)\r\n at System.Activities.AsyncCodeActivity.CompleteAsyncCodeActivityData.CompleteAsyncCodeActivityWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)”,“level”:“Error”,“logType”:“User”,“timeStamp”:“2019-03-07T14:21:29.750102+09:00”,“fingerprint”:“4cc3372f-xxxx-xxxx-xxxx-x615xf8x0448”,“windowsIdentity”:“AD\rmanus-jp”,“machineName”:“XXXXXXXPATH01”,“processName”:“OP_xxxxxx_x04_Bdg”,“processVersion”:“1.0.6995.111111”,“fileName”:“writeLog”,“jobId”:“623xxxxx-1111-1111-1111-11111111111”,“robotName”:“Robot for JP”}

I wonder why this could be happen, as the reference path in the file “uipath\hoge\program\a.xaml”
always defined as absolute path, and “uipath\hoge\common\common.xaml” as well.

Does “#” should not be used as path name…?

If any Idea please let me know the reason.