"MISSING Area: sourcePath=" But the area no longer exists either in source or destination

[AviramDahan]

1. I'm trying to merge all the work items and test plans. If you have any advice for improving the config, I'd love to hear it.
2. I did a lot of runs; maybe there are some temporary folders that I need to clear up?

But the area no longer exists either in source or destination, what can be done to avoid this error.
Errors:

[21:09:25 WRN] [v14.3.10] !! There are MISSING Area or Iteration Paths
[21:09:25 WRN] [v14.3.10] !! There are 1 Nodes (Area or Iteration) found in the history of the Source that are missing from the Target! These MUST be added or mapped before we can continue using the instructions on https://nkdagility.com/learn/azure-devops-migration-tools/Reference/v1/Processors/WorkItemMigrationContext/#iteration-maps-and-area-maps
[21:09:25 WRN] [v14.3.10] MISSING Area: sourcePath=X\XYZ, targetPath=Test-Aviram\X\XYZ, anchored=True, IDs=n/a
[21:09:25 INF] [v14.3.10] DONE in 00:28:38.8302873
[21:09:25 FTL] [v14.3.10] Error while running WorkItemMigration
System.Exception: Missing Iterations in Target preventing progress, check log for list. To continue you MUST configure IterationMaps or AreaMaps that matches the missing paths..

{
  "Version": "14.3",
  "LogLevel": "Verbose",
  "workaroundForQuerySOAPBugEnabled": false,
  "Source": {
    "$type": "TfsTeamProjectConfig",
    "Collection": "X",
    "Project": "X",
    "ReflectedWorkItemIDFieldName": "Custom.ReflectedWorkItemId",
    "AuthenticationMode": "Prompt",
    "AllowCrossProjectLinking": false,
    "PersonalAccessToken": "X",
    "LanguageMaps": {
      "AreaPath": "Area",
      "IterationPath": "Iteration"
    }
  },
  "Target": {
    "$type": "TfsTeamProjectConfig",
    "Collection": "X",
    "Project": "Y",
    "ReflectedWorkItemIDFieldName": "Microsoft.VSTS.Build.IntegrationBuild",
    "AuthenticationMode": "AccessToken",
    "AllowCrossProjectLinking": false,
    "PersonalAccessToken": "X",
    "LanguageMaps": {
      "AreaPath": "Area",
      "IterationPath": "Iteration"
    }
  },
  "FieldMaps": [
    {
      "$type": "TreeToTagMapConfig",
      "WorkItemTypeName": "*",
      "toSkip": 3,
      "timeTravel": 1
    }
  ],
  "WorkItemTypeDefinition": {
    "sourceWorkItemTypeName": "targetWorkItemTypeName"
  },
  "GitRepoMapping": null,
  "CommonEnrichersConfig": [
    {
      "$type": "TfsNodeStructureOptions",
      "PrefixProjectToNodes": false,
      "NodeBasePaths": [],
      "AreaMaps": {},
      "IterationMaps": {},
      "ShouldCreateMissingRevisionPaths": true
    }
  ],
  "Processors": [
    {
      "$type": "ExportUsersForMappingConfig",
      "Enabled": false,
      "LocalExportJsonFile": "c:\\temp\\ExportUsersForMappingConfig.json",
      "WIQLQuery": "SELECT [System.Id], [System.Tags] FROM WorkItems WHERE [System.TeamProject] = @TeamProject AND [System.WorkItemType] NOT IN ('Test Suite', 'Test Plan') ORDER BY [System.ChangedDate] desc",
      "IdentityFieldsToCheck": [
        "System.AssignedTo",
        "System.ChangedBy",
        "System.CreatedBy",
        "Microsoft.VSTS.Common.ActivatedBy",
        "Microsoft.VSTS.Common.ResolvedBy",
        "Microsoft.VSTS.Common.ClosedBy"
      ]
    },
    //{
    //  "$type": "WorkItemDeleteConfig",
    //  "Enabled": true,
    //  "WIQLQueryBit": "AND [System.WorkItemType] NOT IN ('Test Suite', 'Test Plan')",
    //  "WIQLOrderBit": "[System.ChangedDate] desc"
    //},
    {
      "$type": "WorkItemMigrationConfig",
      "Enabled": true,
      "ReplayRevisions": true,
      "PrefixProjectToNodes": true,
      "UpdateCreatedDate": true,
      "UpdateCreatedBy": true,
      "WIQLQueryBit": "AND [System.WorkItemType] NOT IN ('Test Suite', 'Test Plan')",
	  //"WIQLQueryBit": "AND [System.WorkItemType] NOT IN ('Test Case', 'Shared Steps', 'Shared Parameter')",
      "WIQLOrderBit": "[System.ChangedDate] desc",
      "LinkMigration": true,
      "AttachmentMigration": true,
      "AttachmentWorkingPath": "c:\\temp\\WorkItemAttachmentWorkingFolder\\",
      "FixHtmlAttachmentLinks": false,
      "SkipToFinalRevisedWorkItemType": false,
      "WorkItemCreateRetryLimit": 5,
      "FilterWorkItemsThatAlreadyExistInTarget": true,
      "PauseAfterEachWorkItem": false,
      "AttachmentMaxSize": 480000000,
      "AttachRevisionHistory": false,
      "LinkMigrationSaveEachAsAdded": false,
      "GenerateMigrationComment": true,
      "WorkItemIDs": null,
      "MaxRevisions": 0,
      "NodeStructureEnricherEnabled": true,
      "UseCommonNodeStructureEnricherConfig": false,
      "ShouldCreateMissingRevisionPaths": true,
      "NodeBasePaths": [],
      "AreaMaps": {},
      "IterationMaps": {
      },
      "MaxGracefulFailures": 0
    },
    {
      "$type": "WorkItemMigrationConfig",
      "Enabled": true,
      "ReplayRevisions": true,
      "PrefixProjectToNodes": true,
      "UpdateCreatedDate": true,
      "UpdateCreatedBy": true,
      //"WIQLQueryBit": "AND [System.WorkItemType] NOT IN ('Test Suite', 'Test Plan')",
	  "WIQLQueryBit": "AND [System.WorkItemType] NOT IN ('Test Case', 'Shared Steps', 'Shared Parameter')",
      "WIQLOrderBit": "[System.ChangedDate] desc",
      "LinkMigration": true,
      "AttachmentMigration": true,
      "AttachmentWorkingPath": "c:\\temp\\WorkItemAttachmentWorkingFolder\\",
      "FixHtmlAttachmentLinks": false,
      "SkipToFinalRevisedWorkItemType": false,
      "WorkItemCreateRetryLimit": 5,
      "FilterWorkItemsThatAlreadyExistInTarget": true,
      "PauseAfterEachWorkItem": false,
      "AttachmentMaxSize": 480000000,
      "AttachRevisionHistory": false,
      "LinkMigrationSaveEachAsAdded": false,
      "GenerateMigrationComment": true,
      "WorkItemIDs": null,
      "MaxRevisions": 0,
      "NodeStructureEnricherEnabled": true,
      "UseCommonNodeStructureEnricherConfig": false,
      "ShouldCreateMissingRevisionPaths": true,
      "NodeBasePaths": [],
      "AreaMaps": {},
      "IterationMaps": {
      },
      "MaxGracefulFailures": 0
    },
    {
      "$type": "TestVariablesMigrationConfig",
      "Enabled": false
    },
    {
      "$type": "TestConfigurationsMigrationConfig",
      "Enabled": true
    },
    {
      "$type": "TestPlansAndSuitesMigrationConfig",
      "Enabled": true,
      "PrefixProjectToNodes": true,
      "OnlyElementsWithTag": null,
      "TestPlanQueryBit": null,
      "RemoveAllLinks": false,
      "MigrationDelay": 0,
      "UseCommonNodeStructureEnricherConfig": false,
      "NodeBasePaths": [],
      "AreaMaps": null,
      "IterationMaps": null,
      "RemoveInvalidTestSuiteLinks": false,
      "FilterCompleted": false
    }
	

  ]
}

[MrHinsh]

As per the error message "to continue you MUST configure IterationMaps or AreaMaps that matches the missing paths."

The missing area or iteration still exists in the history of the work items in the source, and must be mapped to continue.

Check #1846