Why returned false when using booleancheckTimeseriesExists for existed time series in Apache IoTDB?

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I checked the time series in Apache IoTDB, and it exists. However, when I use the booleancheckTimeseriesExists(String path) method to query certain data results for this time series, the results returned to be false.

Why did this error occur?

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Check if you give a specific time series in booleancheckTimeseriesExists of Apache IoTDB (not a root name or device name). If not, you need to switch to give a specific time series to get the result.