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Important Message

Hello,
Every time I clone a algo from the Community discussion and it happens to be algo posted sometime ago, i am getting "Important Message" that basically says, "We have migrated this algorithm to work with a new version of the Quantopian API...."

Does that mean that the code has been updated to fit the new version (that is different than the algo author's writing)?

Can I be assured that the performance should be the same between the original code (ran under the older version) and the "migrated this algorithm" (ran under the new version).