How to handle work items and fields that has been deleted and not in use now, but TfsWorkItemMigrationProcessor pick up those details from history

[GH-SNS]

I am new to this tool, need your help.

While work item migration came across an error "PopulateWorkItem:FieldUpdate: Missing field in target workitem".
Somebody copied an old work item type and later changed it to different type. Deleted the old one. deleted few fields and added new fields.

Now these old fields and work item is not present in process structure.
Tried to map these fields with different fields using below code, but still not no luck

{
"FieldMapType": "FieldToFieldMultiMap",
"SourceToTargetMappings": {
"SourceField1": "TargetField1",
"SourceField2": "TargetField2"
},
"ApplyTo": [
"SomeWorkItemType",
"SomeOtherWorkItemType"
]
},

Can anyone help me on this, how we can handle deleted fields or work items.

[MrHinsh]

1. The missing field items are warnings, not errors.
2. Work item is not ready to save = You will likely have an invalid field.. the log will tell you exactly which field is invalid and why. Check the log... Have you followed the instructions in the log to check what field is causing the error?
3. Your field mapping code here does not do any mapping for a work item you have.. unless you have a work item called SomeWorkItemType or SomeOtherWorkItemType!

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For fields that are not in the target you can:

1. Ignore them
2. Mapp them using the FieldMappingTool

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For work items that have changed or no longer exist you can map them using the WorkItemTypeMappingTool, this applies to history as well.