AutoMigrate will create many indexes of the same field

[lixh00]

GORM Playground Link

go-gorm/playground#1

Description

AutoMigrate会创建很多个同字段的索引，如下图所示
AutoMigrate will create many indexes of the same field, as shown in the figure below

[github-actions]

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[a631807682]

duplicated of #6224

[lixh00]

duplicated of #6224

The maximum number of MySQL single-table indexes is 64. This BUG will keep creating until all quotas are used up and AutoMigrate can no longer be used.

MySQL单表索引数最大为64个，这个BUG会一直创建，直到用完所有额度导致无法再AutoMigrate。