The aggregate graph data value suddenly becomes 0

[hbgd420]

This graph is an aggregate graph, which is an aggregation of multiple graphs collected at intervals of 5 minutes.

If no data is returned for more than 5 minutes, the aggregate graph curve value is 0.

How to configure it so that it is not 0 or keep the previous value? Otherwise, it feels like the device is down

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[hbgd420]

Can anyone help me？