Pipe: Fixed the bug that aggregate processor cannot clear the last received time after drop (#12383)

diff --git a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/processor/aggregate/AggregateProcessor.java b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/processor/aggregate/AggregateProcessor.java
index 49508f7..4d19195 100644
--- a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/processor/aggregate/AggregateProcessor.java
+++ b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/pipe/processor/aggregate/AggregateProcessor.java
@@ -773,6 +773,7 @@
             == 0) {
       pipeName2timeSeries2TimeSeriesRuntimeStateMap.get(pipeName).clear();
       pipeName2timeSeries2TimeSeriesRuntimeStateMap.remove(pipeName);
+      pipeName2LastValueReceiveTimeMap.remove(pipeName);
     }
     if (Objects.nonNull(windowingProcessor)) {
       windowingProcessor.close();