Duplicate bug report url found for many active bugs

[JoyKrishan]

Hi,

I was manually going through some of the bug reports for the projects. I found that some of the report URLs are duplicates (i.e., they have different bugs with the same URL)

Here is an example of the Cli project.

Bug-ID	Report URL
3	https://issues.apache.org/jira/browse/CLI-1
4	https://issues.apache.org/jira/browse/CLI-1
11	https://issues.apache.org/jira/browse/CLI-1

I am confused about what it is supposed to mean. My initial intuition was that one bug report corresponds to one buggy version of a project. One possible explanation that I have in my mind is that multiple fixes correspond to one bug report; therefore, there are duplicate bug report URLs for different bugs

How to reproduce-
defects4J query -p Cli - p report.url