Description of problem:

Custom rules Manual rules once added clicked again on Add Rules. Always an error message is displayed " Error: File "test2.windup (1).xml" is already uploaded". 

Note: no rules were uploaded. Just click on Add rules

(Screenshot and video is attached below)

Version-Release number of selected component (if applicable):

MTA-6.1.0-8 

How reproducible:

100%

Steps to Reproduce:
1. Custom rules>> Manual>> click on Add rules and upload rules and Click on Add
2. Again click on Add rules
3.

Actual results:

Expected results:

Additional info: