br 迁移 tidb后，写入数据一直报for key 'PRIMARY'

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br版本是v5.4.0
Release Version: v5.4.0
Git Commit Hash: 55f3b24c1c9f506bd652ef1d162283541e428872
Git Branch: heads/refs/tags/v5.4.0
Go Version: go1.16.4
UTC Build Time: 2022-01-25 08:36:34
Race Enabled: false