Cannot migrate attachment: {"Message":"TF401321: Whole Bulk failed."}}

[rsuthinan]

Please see below. Any idea where the issue could be? I even tried to execute the individual PATCH request directly in POSTMAN and I can do it so something must be wrong with the bulk update. I'm using the latest version from the master branch.

[Info @14.38.12.520] Completed migration phase 2
[Info @14.38.40.167] MIGRATION STATUS:
work items that succeeded phase 1 migration: 0
work items that failed phase 1 migration: 0
work items to be processed in phase 1: 0
work items that succeeded phase 2 migration: 0
work items that failed phase 2 migration: 0
work items to be processed in phase 2: 0
[Error @14.39.05.491] 27 total work item(s) failed.
[Error @14.39.05.494] 1 work item(s) failed for this reason: BadRequest.
[Error @14.39.05.494] 26 work item(s) failed for this reason: UnexpectedError.
[Info @14.39.05.494] Migration complete
[Info @14.39.05.494] MIGRATION STATUS:
work items that succeeded phase 1 migration: 0
work items that failed phase 1 migration: 0
work items to be processed in phase 1: 0
work items that succeeded phase 2 migration: 0
work items that failed phase 2 migration: 0
work items to be processed in phase 2: 0
[Info @14.39.05.501] Summary of errors and warnings:
[Error @14.39.05.514] 27 total work item(s) failed.
[Error @14.39.05.520] 1 work item(s) failed for this reason: BadRequest.
[Error @14.39.05.527] 26 work item(s) failed for this reason: UnexpectedError.
WitBatchRequestsFromBatch1WithFailure2020-03-10_14-35-01-901.log