We see that Pegarules logs are full with below errors. Any suggestion how to stop them? 

FYI- We do not use dataflows in our application.

2020-11-27 15:53:11,691 [low-Pulse-Executor:7] [  STANDARD] [                    ] [                    ] (.DataFlowServicePulseOperation) ERROR   - Error while executing pulse task: PickupStreamableTask java.lang.NullPointerException: null     at com.pega.pegarules.priv.database.sqlgen.NativeSQL.populateOperandWithAppropriatePrefix(NativeSQL.java:530) ~[prpublic.jar:?]     at com.pega.pegarules.priv.database.sqlgen.NativeSQL.populateLeftOperand(NativeSQL.java:502) ~[prpublic.jar:?]     at com.pega.pegarules.priv.database.sqlgen.NativeSQL.filter(NativeSQL.java:219) ~[prpublic.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.persistence.db.PersistenceDbUtils.equalFilter(PersistenceDbUtils.java:138) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.persistence.db.PersistenceDbUtils.equalFilter(PersistenceDbUtils.java:146) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.persistence.db.RunDbPersistence$RunDbQueryBuilder.addFilter(RunDbPersistence.java:430) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.persistence.db.RunDbPersistence$RunDbQueryBuilder.addFilters(RunDbPersistence.java:421) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.persistence.db.RunDbPersistence$RunDbQueryBuilder.getIds(RunDbPersistence.java:384) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.servicepulse.PickupStreamableTask.execute(PickupStreamableTask.java:83) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.DataFlowServicePulseOperation.handleTasks(DataFlowServicePulseOperation.java:106) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.DataFlowServicePulseOperation.access$000(DataFlowServicePulseOperation.java:46) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.DataFlowServicePulseOperation$1.run(DataFlowServicePulseOperation.java:87) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.DataFlowServicePulseOperation$1.run(DataFlowServicePulseOperation.java:81) ~[d-node.jar:?]     at com.pega.dsm.dnode.util.PrpcRunnable.execute(PrpcRunnable.java:67) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.ServiceHelper.executeInPrpcContextInternal(ServiceHelper.java:296) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.service.ServiceHelper.executeInPrpcContext(ServiceHelper.java:145) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.dataflow.service.DataFlowServicePulseOperation.lambda$handlePulses$1(DataFlowServicePulseOperation.java:81) ~[d-node.jar:?]     at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:108) ~[guava-19.0.jar:?]     at com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:41) ~[guava-19.0.jar:?]     at com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:77) ~[guava-19.0.jar:?]     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[?:1.8.0_271]     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[?:1.8.0_271]     at com.pega.dsm.dnode.util.PrpcRunnable$1.run(PrpcRunnable.java:59) ~[d-node.jar:?]     at com.pega.dsm.dnode.util.PrpcRunnable$1.run(PrpcRunnable.java:56) ~[d-node.jar:?]     at com.pega.dsm.dnode.util.PrpcRunnable.execute(PrpcRunnable.java:67) ~[d-node.jar:?]     at com.pega.dsm.dnode.impl.prpc.PrpcThreadFactory$PrpcThread.run(PrpcThreadFactory.java:124) ~[d-node.jar:?]