syntax error at end of input

[MeikelLP]

Log

Marten encountered an exception executing 
select CustomName.mt_overwrite_product($1,$2,$3,$4,$5);
  : {REDACTED}
  : SomeNamespace.SomeType
  : 00025d06-0000-0000-0000-000000000000
  : 
  : 4
Npgsql.PostgresException (0x80004005): 42601: syntax error at end of input

POSITION: 38
   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.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken)
   at Npgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken)
   at Npgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken)
   at Npgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken)
   at Marten.Internal.Sessions.AutoClosingLifetime.ExecuteBatchPagesAsync(IReadOnlyList`1 pages, List`1 exceptions, CancellationToken token) in /_/src/Marten/Internal/Sessions/AutoClosingLifetime.cs:line 315
  Exception data:
    Severity: ERROR
    SqlState: 42601
    MessageText: syntax error at end of input
    Position: 38
    File: scan.l
    Line: 1236
    Routine: scanner_yyerror

prodcedure source

create function mt_overwrite_product(doc jsonb, docdotnettype character varying, docid uuid, lastmodifiedby character varying, revision integer) returns integer
    language plpgsql
as
$$
DECLARE
  final_version INTEGER;
  current_version INTEGER;
BEGIN

  if revision = 0 then
    SELECT mt_version FROM CustomName.mt_doc_product into current_version WHERE id = docId ;
    if current_version is not null then
      revision = current_version + 1;
    else
      revision = 1;
    end if;
  end if;

  INSERT INTO CustomName.mt_doc_product ("data", "mt_dotnet_type", "id", "last_modified_by", "mt_version", mt_last_modified, mt_created_at) VALUES (doc, docDotNetType, docId, lastModifiedBy, revision, transaction_timestamp(), transaction_timestamp())
  ON CONFLICT (id)
  DO UPDATE SET "data" = doc, "mt_dotnet_type" = docDotNetType, "last_modified_by" = lastModifiedBy, "mt_version" = revision, mt_last_modified = transaction_timestamp();

  SELECT mt_version FROM CustomName.mt_doc_product into final_version WHERE id = docId ;
  RETURN final_version;
END;
$$;

alter function mt_overwrite_product(jsonb, varchar, uuid, varchar, integer) owner to CustomName;

marten config

builder.Services.AddMarten(options =>
    {
        options.Connection(builder.Configuration.GetConnectionString("CustomName")!);
        options.DatabaseSchemaName = "CustomName";
        options.DisableNpgsqlLogging = true;
        options.Events.MetadataConfig.UserNameEnabled = true;
        options.UseSystemTextJsonForSerialization(ConfigureJson(new JsonSerializerOptions()));
        options.Schema.For<Product>().Metadata(m =>
        {
            m.LastModified.MapTo(x => x.UpdatedAt);
            m.LastModifiedBy.Enabled = true;
            m.LastModifiedBy.MapTo(x => x.UpdatedBy);
            m.CreatedAt.Enabled = true;
            m.CreatedAt.MapTo(x => x.CreatedAt);
        });
        options.Projections.Add<ProductProjection>(ProjectionLifecycle.Async);
        options.UpdateBatchSize = 100_000;
    })
    .AddAsyncDaemon(DaemonMode.HotCold)
    .UseLightweightSessions()
    .PublishEventsToWolverine("Everything")
    .IntegrateWithWolverine(cfg =>
    {
        cfg.UseFastEventForwarding = true;
        cfg.UseWolverineManagedEventSubscriptionDistribution = true;
    });

Anything else I need to supply?
I didn't find a workaround for it yet nor how this issue occurred in the first place

Thus only 125 of 52,868 documents are created. I don't know why some work and mostly all other fail