I couldn't save changes in newly created public transport route

[anonymous]

What steps will reproduce the problem?

I have opened but empty master_route and editing one way route of local bus.
I pressed "Сохранить внесённые изменения" button and after that I'm here

What is the expected result?

Save my changes

What happens instead?

Error message

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: 2020-07-30 12:44:04 +0200 (Thu, 30 Jul 2020)
Build-Date:2020-07-31 01:30:49
Revision:16812
Relative:URL: ^/trunk

Identification: JOSM/1.5 (16812 ru) Windows 10 64-Bit
OS Build number: Windows 10 Enterprise 2004 (20197)
Memory Usage: 989 MB / 989 MB (254 MB allocated, but free)
Java version: 1.8.0_261-b12, Oracle Corporation, Java HotSpot(TM) Client 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

Dataset consistency test:
[NO DATASET] {Way id=-102189 version=0 MVT nodes=[{Node id=1825424499 version=3 VT lat=56.2465653,lon=43.8505666}, {Node id=2259950182 version=2 VT lat=56.2466341,lon=43.8505873}]} is referenced by {Relation id=-99976 version=0 VT [линия -102158, линия 41339166, линия 41339168, линия 172158907, линия 31452704, линия 172158943, линия 435595541, линия 172315951, линия 172315797, линия 172159035, линия 171692612, линия 31426417, линия 32143225, линия 433028491, линия 433028493, линия 44104935, линия 171952420, линия 44104937, линия 171952421, линия 31456860, линия 439461692, линия 43653914, линия 171527602, линия 41273115, линия -102189, линия 439461689, линия 694697782, линия 694697783, линия 48731555, линия 391914024, линия 171527625, линия 48731552, линия 535349456, линия 32143374, линия 84140512, линия 386467156, линия 180678484, линия 386467155, линия 386467157, линия 172860307, линия 171262964, линия 43652896, линия 48571087, линия 391912233, линия 306795385, линия 48571089, линия 41273114, линия 763952271, линия 172438438, линия 40032376, линия 40032369, линия 379721724, линия 379721726, линия 379721730, линия 503501152, линия 321710290, линия 503501151, линия 321710289, линия 535308102, линия 379721735, линия 638310433, линия 535379054, линия 535379052, линия 40032357, линия 193732433, линия 40729977, линия 193732428, линия 535691391, линия 535691388, линия 27804494, линия 569080766, линия 535691400, линия 535691383, линия 535691379, линия 535691363, линия 535691401, линия 24240415, линия 148771958, линия 44117968, линия 206413760, линия 24240417, линия 60880945, линия 41129268, линия 40716974, линия 24240416, линия 686127056, линия 153799397, линия 130906316, линия 115547988, линия 213037948, линия 187356027, линия 115547989, линия 130906315, линия 48864291, линия 41129602, линия 211675881, линия 133741676, линия 64900865, линия 133741670, линия 120810050, линия 118907991, линия 118907992, линия 684468327, линия 677439665, линия 677439668, линия 700215779, линия 694837279, линия 159088319, линия 201754488, линия 39538262, линия 159088286, линия 201564683, линия 201754489, линия 201754490, линия 40110760, линия 35106021, линия 84806177, линия 37743637, линия 84806181, линия 44080835, линия 44080834, линия 31928762, линия 512874197, линия 205017771, линия 205017770, линия 205017772, линия 31928764, линия 157740232, линия 534318260, линия 44066325, линия 44066440, линия 31928774, линия 43650659, линия 41189493, линия 157740189, линия 223332645, линия 159489776, линия 187676218, линия 27770100, линия 41189726, линия 533917331, линия 157740209, линия 27770101, линия 242209942, линия 158755234, линия 158755235, линия 158755236, линия 148770986, линия 158630769, линия 41188877, линия 41188871, линия 43734871, линия 148770981, линия 27770110, линия 148770980, линия 178137627, линия 515305422, линия 178137625, линия 42776144, линия 42776152, линия 210419559, линия 168040171, линия 154122680, линия 211222043, линия 168040173, линия 210419560, линия 42776153, линия 524483445, линия 154122672, линия 154122676, линия 148770988, линия 42776146, линия 168040172, линия 155538755, линия 155538747, линия 155538751, линия 155538745, линия 155538742, линия 155538744, линия 84593136, линия 84593139, линия 42771819, линия 84593114, линия 233495359, линия 233495358, линия 155538752, линия 155535688, линия 155535685, линия 227318990, линия 149637620, линия 155644588, линия 155535686, линия 155644582, линия 155535687, линия 156530694, линия 80328768, линия 79683655, линия 79683653, линия 155644584, линия 42776149, линия 41187239, линия 61366661, линия 41187234]} but not found in dataset


Plugins:
+ CADTools (1008)
+ CustomizePublicTransportStop (35248)
+ FastDraw (35499)
+ RelationDissolve (0.2.0)
+ RoadSigns (35510)
+ ShapeTools (1240)
+ SimplifyArea (35405)
+ buildings_tools (35500)
+ changeset-viewer (22)
+ imagery_offset_db (35405)
+ osm-obj-info (56)
+ pt_assistant (2.1.10-80-g7d9bba3)
+ rasterfilters (35405)
+ utilsplugin2 (35487)

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Building_Levels_Labels&zip=1
+ https://pasharm.github.io/New_basic_style_for_JOSM/New_basic_style.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/MaxspeedIcons&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PTStops&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransportV2&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/NewHighwayColors&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/NumberedCycleNodeNetworks&zip=1

Last errors/warnings:
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- W: Unable to convert property color to type class java.awt.Color: found # of type class java.lang.String!
- E: Handled by bug report queue: org.openstreetmap.josm.data.osm.DataIntegrityProblemException: Relation member must be part of the same dataset as relation(отношение -99976, линия -102189) (changed by the following commands: [Последовательность: Разбить линию ‎улица Краснодонцев‎ (7 точек) на 2 части (undone)])


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (16) of main
org.openstreetmap.josm.data.osm.DataIntegrityProblemException: Relation member must be part of the same dataset as relation(отношение -99976, линия -102189) (changed by the following commands: [Последовательность: Разбить линию ‎улица Краснодонцев‎ (7 точек) на 2 части (undone)])
	at org.openstreetmap.josm.data.osm.Relation.checkMembers(Relation.java:487)
	at org.openstreetmap.josm.data.osm.Relation.setDataset(Relation.java:471)
	at org.openstreetmap.josm.data.osm.DataSet.lambda$addPrimitive$5(DataSet.java:502)
	at org.openstreetmap.josm.data.osm.DataSet.update(DataSet.java:955)
	at org.openstreetmap.josm.data.osm.DataSet.addPrimitive(DataSet.java:495)
	at org.openstreetmap.josm.command.AddCommand.executeCommand(AddCommand.java:54)
	at org.openstreetmap.josm.data.UndoRedoHandler.addNoRedraw(UndoRedoHandler.java:300)
	at org.openstreetmap.josm.data.UndoRedoHandler.add(UndoRedoHandler.java:354)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.SavingAction.applyNewRelation(SavingAction.java:66)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.SavingAction.applyChanges(SavingAction.java:161)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.ApplyAction.actionPerformed(ApplyAction.java:31)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$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)

[skyper]

Similar to #19353.

[GerdP]

Very likely fixed with r17063, see #19353.