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MySQL error code

MySQL error 1873

MySQL server error 1873 is ER_ACCESS_DENIED_CHANGE_USER_ERROR, reported with SQLSTATE 28000.

Access denied trying to change to user '%s'@'%s' (using password: %s). Disconnecting.
Error1873
NameER_ACCESS_DENIED_CHANGE_USER_ERROR
SQLSTATE28000
GroupServer errors

In other databases

Source: MySQL 8.4 Error Reference