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Apache IoTDB does not remove a measurement point after encountering a 411 error when executing a delete statement.

A 411 error in IoTDB indicates that the timestamp specified in the delete statement does not exist in the database. This could be because the measurement point has already been deleted or because the timestamp specified is outside the range of available data.

If the measurement point has already been deleted, it will not be removed again. If the timestamp specified is outside the range of available data, the delete statement will have no effect.

In either case, it is up to the user to ensure that the correct measurement point and timestamp are specified in the delete statement.