IScheduledDayAheadTransferSyncJob.Run

Npgsql.PostgresException (edh:1332730)

53300: sorry, too many clients already

Npgsql.PostgresException: 53300: sorry, too many clients already
   at Npgsql.Internal.NpgsqlConnector.ReadMessageLong(Boolean async, DataRowLoadingMode dataRowLoadingMode, Boolean readingNotifications, Boolean isReadingPrependedMessage)
   at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder`1.StateMachineBox`1.System.Threading.Tasks.Sources.IValueTaskSource<TResult>.GetResult(Int16 token)
   at Npgsql.Internal.NpgsqlConnector.Authenticate(String username, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
   at Npgsql.Internal.NpgsqlConnector.<Open>g__OpenCore|213_1(NpgsqlConnector conn, SslMode sslMode, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken, Boolean isFirstAttempt)
   at Npgsql.Internal.NpgsqlConnector.Open(NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
   at Npgsql.PoolingDataSource.OpenNewConnector(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
   at Npgsql.PoolingDataSource.<Get>g__RentAsync|33_0(NpgsqlConnection conn, NpgsqlTimeout timeout, Boolean async, CancellationToken cancellationToken)
   at Npgsql.NpgsqlConnection.<Open>g__OpenAsync|42_0(Boolean async, CancellationToken cancellationToken)
   at EnergyDataHub.Data.Services.TimeseriesBulkInserter.BulkInsertAsync(IEnumerable`1 values)
   at EnergyDataHub.Data.Services.TimeseriesBulkInserter.BulkInsertAsync(IEnumerable`1 values)
   at EnergyDataHub.Data.Helpers.TimeseriesBatchCollector.<>c__DisplayClass1_0.<<CreateInsertAction>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at EnergyDataHub.Data.Helpers.BatchCollector`1.FlushAsync()
   at EnergyDataHub.Data.Hangfire.Jobs.TransferSyncJobBase.RunTransferSyncAsync(Dictionary`2 baseParams, DocumentType documentType)
   at EnergyDataHub.Data.Hangfire.Jobs.ScheduledDayAheadTransferSyncJob.Run()
   at InvokeStub_TaskAwaiter.GetResult(Object, Object, IntPtr*)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)