JOSM doesn't handle gracefully when a relation is attempted to be deleted for a second time.

[anonymous]

What steps will reproduce the problem?

1. Opening a parent relation
2. Selecting a child relation
3. Deleting the child relation
4. Selecting the deleted relation again
5. Trying to delete the already deleted child relation

What is the expected result?

Error message

What happens instead?

JOSM offers to create a bug

Please provide any additional information below. Attach a screenshot if possible.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2022-07-07 23:02:39 +0200 (Thu, 07 Jul 2022)
Build-Date:2022-07-08 01:30:57
Revision:18513
Relative:URL: ^/trunk

Identification: JOSM/1.5 (18513 cs) Windows 10 64-Bit
OS Build number: Windows 10 Home 2009 (19044)
Memory Usage: 1602 MB / 7275 MB (1186 MB allocated, but free)
Java version: 1.8.0_321-b07, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1250
System property sun.jnu.encoding: Cp1250
Locale info: cs_CZ
Numbers with default locale: 1234567890 -> 1234567890
VM arguments: [-Djava.security.manager, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlp.tk=awt, -Djnlpx.jvm=<java.home>\bin\javaw.exe, -Djnlpx.splashport=55163, -Djnlpx.home=<java.home>\bin, -Djnlpx.remove=false, -Djnlpx.offline=false, -Djnlpx.relaunch=true, -Djnlpx.session.data=%UserProfile%\AppData\Local\Temp\session6643754574047348591, -Djnlpx.heapsize=NULL,NULL, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.origFilenameArg=%UserProfile%\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\56\1ee8cfb8-101c93dd]
Dataset consistency test: No problems found

Plugins:
+ DirectUpload (35951)
+ Lanes (${version.entry.commit.revision})
+ OpeningHoursEditor (35924)
+ Tracer (35978)
+ apache-commons (35924)
+ apache-http (35924)
+ buildings_tools (35997)
+ editgpx (35931)
+ ejml (35924)
+ geotools (35959)
+ imagery_offset_db (35978)
+ jackson (35958)
+ jaxb (35952)
+ jna (35924)
+ jts (35976)
+ log4j (35924)
+ measurement (35978)
+ photo_geotagging (35933)
+ poly (35976)
+ reltoolbox (35976)
+ routes (35893)
+ utilsplugin2 (36001)

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Enhanced_Lane_and_Road_Attributes&zip=1

Last errors/warnings:
- 00036.940 E: org.openstreetmap.josm.data.osm.search.SearchParseError: Neočekávaný token: <rovná se>
- 00036.944 E: org.openstreetmap.josm.data.osm.search.SearchParseError: Neočekávaný token: <rovná se>
- 00036.945 E: org.openstreetmap.josm.data.osm.search.SearchParseError: Neočekávaný token: <rovná se>
- 00036.946 E: org.openstreetmap.josm.data.osm.search.SearchParseError: Neočekávaný token: <rovná se>
- 00152.179 E: Handled by bug report queue: java.lang.IllegalArgumentException: {Relation id=1717720 version=12 MVDT]} is already deleted



=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-2 (46) of javawsApplicationThreadGroup
java.lang.IllegalArgumentException: {Relation id=1717720 version=12 MVDT]} is already deleted
	at org.openstreetmap.josm.command.DeleteCommand.lambda$executeCommand$0(DeleteCommand.java:211)
	at org.openstreetmap.josm.data.osm.DataSet.update(DataSet.java:1003)
	at org.openstreetmap.josm.command.DeleteCommand.executeCommand(DeleteCommand.java:207)
	at org.openstreetmap.josm.data.UndoRedoHandler.addNoRedraw(UndoRedoHandler.java:300)
	at org.openstreetmap.josm.data.UndoRedoHandler.add(UndoRedoHandler.java:354)
	at org.openstreetmap.josm.actions.mapmode.DeleteAction.deleteRelations(DeleteAction.java:367)
	at org.openstreetmap.josm.actions.mapmode.DeleteAction.deleteRelation(DeleteAction.java:348)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.DeleteCurrentRelationAction.actionPerformed(DeleteCurrentRelationAction.java:38)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)