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release note: add a check item for feedback-probability (#6405) #6445

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Sep 10, 2021
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release note: add a check item for feedback-probability (#6405) #6445

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a64f610
This is an automated cherry-pick of #6405
shichun-0415 Sep 10, 2021
351a500
Delete release-5.1.0.md
TomShawn Sep 10, 2021
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1 change: 1 addition & 0 deletions releases/release-5.0.0.md
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Expand Up @@ -68,6 +68,7 @@ In v5.0, the key new features or improvements are as follows:

### Others

+ Before the upgrade, check the value of the TiDB configuration [`feedback-probability`](/tidb-configuration-file.md#feedback-probability). If the value is not 0, the "panic in the recoverable goroutine" error will occur after the upgrade, but this error does not affect the upgrade.
+ Forbid conversion between `VARCHAR` type and `CHAR` type during the column type change to avoid data correctness issues.

## New features
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