id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
20040	IllegalStateException: Duplicate key in log when uninstalling Mapillary plugin	GerdP	taylor.smock	"==== What steps will reproduce the problem?
1. Install plugin Mapillary
2. Uninstall plugin
3. Stop/Start JOSM
4. repeat steps 1+2 (plugin files exist already)

==== What is the expected result?
no error message in log
==== What happens instead?
log shows error message and traceback, dialog shows popup ""You have to restart JOSM...""
==== Please provide any additional information below. Attach a screenshot if possible.
Happened with when checking changes in #7548
{{{
Build-Date:2020-11-06 08:56:27
Revision:17299
Is-Local-Build:true

Identification: JOSM/1.5 (17299 SVN en) Windows 10 64-Bit
OS Build number: Windows 10 Home 2004 (19041)
Memory Usage: 833 MB / 1753 MB (677 MB allocated, but free)
Java version: 1.8.0_272-b10, AdoptOpenJDK, OpenJDK 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920x1080 (scaling 1.0x1.0)
Maximum Screen Size: 1920x1080
Best cursor sizes: 16x16 -> 32x32, 32x32 -> 32x32
Program arguments: [--debug]

Plugins:
+ Mapillary (1.5.27)
+ OpeningHoursEditor (35579)
+ apache-commons (35524)
+ apache-http (35092)
+ buildings_tools (35579)
+ continuosDownload (91)
+ ejml (35313)
+ geotools (35169)
+ jaxb (35092)
+ jna (35092)
+ jts (35122)
+ o5m (35248)
+ opendata (35513)
+ pbf (35636)
+ poly (35248)
+ reltoolbox (35602)
+ reverter (35638)
+ undelete (35521)
+ utilsplugin2 (35624)

Validator rules:
+ c:\josm\core\resources\data\validator\geometry.mapcss

Last errors/warnings:
- 00072.279 E: java.lang.IllegalStateException: Duplicate key org.openstreetmap.josm.gui.io.RecentlyOpenedFilesMenu[,0,0,0x0,invalid,alignmentX=0.0,alignmentY=0.0,border=javax.swing.plaf.basic.BasicBorders$MarginBorder@4a34e9f,flags=256,maximumSize=,minimumSize=,preferredSize=,defaultIcon=javax.swing.ImageIcon@68f6b075,disabledIcon=,disabledSelectedIcon=,margin=javax.swing.plaf.InsetsUIResource[top=0,left=0,bottom=0,right=0],paintBorder=false,paintFocus=false,pressedIcon=,rolloverEnabled=true,rolloverIcon=,rolloverSelectedIcon=,selectedIcon=,text=Open Recent]
}}}
"	defect	closed	normal		Plugin mapillary		fixed	template_report