tsbs_load_timescaledb panic: ERROR: COPY from stdin failed: expected 4 values, got 11 values (SQLSTATE 57014)

Trying to use tsbs_load_timescaledb to benchmark native partitions in Postgres 13.3.

cat timescaledbdata_iot_Jun21_3days.gz | gunzip | /root/go/bin/tsbs_load_timescaledb --postgres=sslmode=disable --db-name=test --host="$PGHOST" --port="$PGPORT" --pass="$PGPASSWORD" --user="$PGUSER" --workers=4 --batch-size=10000 --reporting-period=10s --use-hypertable=false --use-jsonb-tags=false --in-table-partition-tag=true --hash-workers=false --time-partition-index=false --partitions=0 --write-profile= --field-index-count=1 --create-metrics-table=false --do-create-db=false --force-text-format=false 2>&1

It fails with the following error -

time,per. metric/s,metric total,overall metric/s,per. row/s,row total,overall row/s
panic: ERROR: COPY from stdin failed: expected 4 values, got 11 values (SQLSTATE 57014)

goroutine 67 [running]:
github.com/timescale/tsbs/pkg/targets/timescaledb.(*processor).processCSI(0xc00008c000, 0xc000d73a00, 0x8, 0xc00110c000, 0x10ca, 0x1400, 0xc0008b7d00)
        /root/go/pkg/mod/github.com/timescale/tsbs@v0.0.0-20210824175328-1eb7705ff921/pkg/targets/timescaledb/process.go:255 +0x1153

Created readings, diagnostics and tag table. Modified readings table to create data partitions as follows.

CREATE TABLE public.readings (
                 time               timestamp with time zone
                ,tags_id            integer
                ,name               text
                ,latitude           double precision
                ,longitude          double precision
                ,elevation          double precision
                ,velocity           double precision
                ,heading            double precision
                ,grade              double precision
                ,fuel_consumption   double precision
                ,additional_tags    jsonb
) PARTITION BY RANGE (time);

ALTER TABLE public.readings 
      ALTER COLUMN elevation TYPE real,
      ALTER COLUMN velocity TYPE real,
      ALTER COLUMN heading TYPE real,
      ALTER COLUMN grade TYPE real,
      ALTER COLUMN fuel_consumption TYPE real;

CREATE INDEX readings_tags_id_time_idx ON public.readings USING btree (tags_id, time DESC);
CREATE INDEX readings_time_idx ON public.readings  USING btree (time DESC);
CREATE INDEX readings_latitude_time_idx ON public.readings USING btree (latitude, time DESC);
CREATE INDEX readings_time_brin_idx ON public.readings USING BRIN (time) WITH (pages_per_range = 32);

SELECT partman.create_parent( 
 p_parent_table => 'public.readings',
 p_control => 'time',
 p_type => 'native',
 p_interval=> 'hourly',
 p_start_partition=> '2021-06-08 00:00:00',
 p_premake => 168); -- 24*7

UPDATE partman.part_config 
SET infinite_time_partitions = true,
    retention = '3 months', 
    retention_keep_table=true 
WHERE parent_table = 'public.readings';

Without creating data partitions on readings table, benchmark works fine.

timescale / tsbs

tsbs_load_timescaledb panic: ERROR: COPY from stdin failed: expected 4 values, got 11 values (SQLSTATE 57014) #184