Oracle : Ошибка ORA-29338

"datafile %s is in an undesired state (%s, %s)"
*Cause: The referred datafile is not in a state ready for tablespace
copy operation. For example, the datafile may be offline. The
datafile needs to be ONLINE, and either READ ONLY or READ WRITE.
*Action: Put the datafile into the desired state.

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