DIA-28403：file string cannot be modified because it is an online data file
错误码
错误描述：file string cannot be modified because it is an online data file
错误原因：An attempt was made to modify an online data file when the file was not expected to be part of the database.
解决方法：Check the status of the file and its tablespace and make sure it is offline or is a copy of a data file
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