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We're cleaning up questions that were wrongfully migrated to Programmers by the community -cough subjective anecdotes polls find me a job cough- To do this on our end, I first clear an original question's migration history, then close it again as not constructive.

On doing this today, I discovered that answers to the question that were posted on the original site weren't automatically restored when I cleared the migration data.

Here's the question I performed it on: First programming language to learn? (and its revision history)

I'm pretty sure I used the "clear migration history" option to undo the migration before closing the question again. Did something go wrong in the backend?

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No, something didn't go wrong; that's how it was designed. But I agree that it is a bit odd. Note that "Clear Migration History" does just that; it removes the migration history and URL redirect from the question. It doesn't undelete the answers (answer deletion being a side-effect of the question migration); you currently have to do that separately. – Robert Harvey Dec 7 '11 at 16:08
@RobertHarvey - I could have sworn that it undeleted the answers. – ChrisF Dec 7 '11 at 16:18
I'm almost certain that it did at one time. Presumably, reversible migrations happen fairly early in the life cycle of a question (when there are few answers), when answer undeletion is still a minor housekeeping detail. Migration reversals require coordination on both sites anyway, so it's not like you can make them completely turnkey. – Robert Harvey Dec 7 '11 at 16:20
But if it is a bug or reversion, it would be nice to get it fixed. – Robert Harvey Dec 7 '11 at 16:24
up vote 6 down vote accepted

Starting with the next build, clearing a migration history will:

  1. restore reputation to where it should be within 5 minutes
  2. undelete answers that were deleted as part of the migration itself
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