JBPM not able to handle concurrent API Request

[SF]

We are using Spring boot with JBPM (7.53.0.Final)

Steps Includes:

Step 1 : Perform a GET call (/rest/server/queries/processes/instance/correlation/${correlationKey}) to check if a workflow exists in JBPM.

Step 2 : If workflow does not exists then do a POST call (rest/server/containers/${workflow-name}/processes/${workflow-id}/instances/correlation/${correlationKey})

When two request hit the api at the same time the below error occurs:

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SQL Error: 0, SQLState: 40001

ERROR: could not serialize access due to read/write dependencies among transactions Detail: Reason code: Canceled on identification as a pivot, during write. Hint: The transaction might succeed if retried.

Could not commit session"javax.persistence.OptimisticLockException: org.hibernate.exception.LockAcquisitionException: could not execute statement
at org.hibernate.internal.ExceptionConverterImpl.wrapLockException(ExceptionConverterImpl.java:277)
at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:98)
at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1602)
at org.hibernate.query.Query.getResultList(Query.java:165)
at org.jbpm.services.task.persistence.JPATaskPersistenceContext.queryStringWithParameters(JPATaskPersistenceContext.java:704)
at org.jbpm.services.task.persistence.JPATaskPersistenceContext.queryWithParametersInTransaction(JPATaskPersistenceContext.java:527)
at org.jbpm.services.task.audit.JPATaskLifeCycleEventListener.getAuditTask(JPATaskLifeCycleEventListener.java:519)
at org.jbpm.services.task.audit.JPATaskLifeCycleEventListener.afterTaskActivatedEvent(JPATaskLifeCycleEventListener.java:102)
at org.jbpm.services.task.events.TaskEventSupport.lambda$fireAfterTaskActivated$22(TaskEventSupport.java:192)
at org.drools.core.event.AbstractEventSupport.notifyAllListeners(AbstractEventSupport.java:63)
Caused by: org.hibernate.exception.LockAcquisitionException: could not execute statement
at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:120)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:200)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3297)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3824)
at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:107)
at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604)
at org.hibernate.engine.spi.ActionQueue.lambda$executeActions$1(ActionQueue.java:478)
Caused by: org.postgresql.util.PSQLException: ERROR: could not serialize access due to read/write dependencies among transactions
Detail: Reason code: Canceled on identification as a pivot, during write.
Hint: The transaction might succeed if retried.
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2553)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2285)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:323)
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:481)
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:401)
at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:164)
at org.postgresql.jdbc.PgPreparedStatement.executeUpdate(PgPreparedStatement.java:130)
at jdk.internal.reflect.GeneratedMethodAccessor106.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)

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I would like to know why this error occurs and what will be the solution to solve this issue ?