Huang Zhw b97a4ad7f2 Fix migrateCommand may migrate wrong value. (#8815)
This scene is hard to happen. When first attempt some keys expired,
only kv position is updated not ov. Then socket err happens, second
attempt is taken. This time kv items may be mismatching with ov items.

(cherry picked from commit 080d4579db40d965f8392af5b1da7a99d1a817d5)
2021-05-03 22:57:00 +03:00
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