Batch campaign pausing saying "Changes can't be undone" in account change history

[Tim]

With the Adwords API v201809 - we're using BatchJobUtilities.Upload with a list of CampaignOperation which are setting campaigns to paused.

BatchJobUtilities batchJobUploadHelper = BatchJobUploadHelper(accountId);

string resumableUploadUrl = batchJobUploadHelper.GetResumableUploadUrl(batchJob.uploadUrl.url);

batchJobUploadHelper.Upload(resumableUploadUrl, operations);

When this operation is complete we're seeing "Changes can't be undone" in the "Change history" of the account in the Adwords UI.

Why can't these changes be undone? We have another app doing the same thing in Java using CampaignServiceInterface in v201806 which is allowing undo.