Stuck in V1.33.0 because I can't create a valid Backup file. -> "Error: invalid page in block XXXX of relation base/YYYY/ZZZZ" Any advice?

[Steffi100]

Hello,
I want to upgrade to the newer 2.0.X Teslamate versions but i can't create a valid backup file. Everything seems to work fine with the current database in V1.33.0, however the backup command fails on me:
I am not an expert in Database repair and i was hoping for a fix that does not require detailed knowledge of database structures. I messed around with REINDEX and VACUUM FULL but that seemed to made it worse. Any help from the community who experienced similar issues and found a solution?

docker compose --verbose exec -T database pg_dump -U teslamate --verbose teslamate > ./teslamate.bck pg_dump: last built-in OID is 16383
pg_dump: reading extensions
pg_dump: identifying extension members
pg_dump: reading schemas
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.
.
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pg_dump: dumping contents of table "public.positions"
pg_dump: error: Dumping the contents of table "positions" failed: PQgetResult() failed.
pg_dump: error: Error message from server: ERROR: invalid page in block 121423 of relation base/16384/17399
pg_dump: error: The command was: COPY public.positions (id, date, latitude, longitude, speed, power, odometer, ideal_battery_range_km, battery_level, outside_temp, elevation, fan_status, driver_temp_setting, passenger_temp_setting, is_climate_on, is_rear_defroster_on, is_front_defroster_on, car_id, drive_id, inside_temp, battery_heater, battery_heater_on, battery_heater_no_power, est_battery_range_km, rated_battery_range_km, usable_battery_level, tpms_pressure_fl, tpms_pressure_fr, tpms_pressure_rl, tpms_pressure_rr) TO stdout;
DEBU[0117] [hijack] End of stdout
steffi-pi1@raspberrypi:~ $