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Hi everyone, I'm running into an issue while migrating work items using MigrationTools 16.0. During the process, I get the following warning in the logs: 
Set options for the fieldField Reference Name: Custom.494ca5ec-f000-4469-9bbe-d61115a75310 My configuration looks like this: {
"Serilog": {
"MinimumLevel": "Information"
},
"MigrationTools": {
"Version": "16.0",
"Endpoints": {
"Source": {
"EndpointType": "TfsTeamProjectEndpoint",
"Collection": "url",
"Project": "Name project",
"Authentication": {
"AuthenticationMode": "AccessToken",
"AccessToken": "xxxxxx"
}
},
"Target": {
"EndpointType": "TfsTeamProjectEndpoint",
"Collection": "url",
"Project": "Other project",
"Authentication": {
"AuthenticationMode": "AccessToken",
"AccessToken": "xxxxx"
},
"ReflectedWorkItemIdField": "Custom.ReflectedWorkItemId"
}
},
"CommonTools": {
"FieldMappingTool": {
"FieldMaps": [
{
"FieldMapType": "FieldToFieldMap",
"ApplyTo": ["Feature"],
"sourceField": "Custom.7f575a7c-7242-40b9-896d-5294af213a98",
"targetField": "Custom.494ca5ec-f000-4469-9bbe-d61115a75310"
}
]
}
},
"Processors": [
{
"ProcessorType": "TfsWorkItemMigrationProcessor",
"Enabled": true,
"Validate": false,
"CreateFieldIfNotExist": true,
"ReplayRevisions": true,
"CollapseRevisions": false,
"PrefixProjectToNodes": false,
"UpdateSourceReflectedId": true,
"AttachmentWorkingPath": "C:\\Migration\\Attachments\\",
"AttachmentMigration": true,
"LinkMigration": true,
"WIQLQuery": "SELECT TOP 1 [System.Id] FROM WorkItems WHERE [System.TeamProject] = @TeamProject AND [System.WorkItemType] IN ('Epic') ORDER BY [System.ChangedDate] desc",
"SourceName": "Source",
"TargetName": "Target"
}
]
}
}🧩 What I’m trying to doI’m mapping a custom field from one project to another. The problem: 🔍 What I’d like help with
Any guidance or examples on validating or fixing field mappings with custom fields would be greatly appreciated! |
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Answered by
leutzed
Nov 12, 2025
Replies: 3 comments 1 reply
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Without teh full log its dificult to tell, but it looks like its saying that it cant find This is normal behaviour as it does a a field to field mapp on everything first, then runs the field mapp... |
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1 reply
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It is correct that HAve you followed https://devopsmigration.io/docs/reference/tools/work-item-type-validator-tool/? |
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Solved by: |
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Answer selected by
leutzed
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