[umbrello] [Bug 415992] New: Duplicate Composition Association when rename it's variable in the tree View

[Hamid Sahraiee]

https://bugs.kde.org/show_bug.cgi?id=415992

            Bug ID: 415992
           Summary: Duplicate Composition Association when rename it's
                    variable in the tree View
           Product: umbrello
           Version: 2.30.0 (KDE Applications 19.12.0)
          Platform: Other
                OS: MS Windows
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: umbrello-devel at kde.org
          Reporter: Sahraiee at gmail.com
  Target Milestone: ---

SUMMARY
when I try to rename a variable in the Tree View that auto generated by the
Composition tool, it create another Association link.

STEPS TO REPRODUCE
1. Create two class C1 and C2 and drag them into the class diagram
2. Choose Composition tool from toolbar
3. Drag it from C1 to C2, a new variable will be appear with the default name
4. go to the Tree view and find that variable and rename it.


OBSERVED RESULT
 another association will be create [therefore there is two association] and
rename both of them. can be checked in the class Properties/Associations

EXPECTED RESULT
 just rename the existing association variable. 

SOFTWARE/OS VERSIONS
Windows: Win 10 64bit / 1903
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
I Suggest the default variable name that is generated in the composition
association be the target class name that starts with "_".

Excuse me for my bad English
thanks a lot.

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