larger error trace, I think this is the target-postgresql not being ready for python 3.10 .. ```2022-09-18T154639.723331Z [info ] time=2022-09-18 174639 name=tap-ibkr level=INFO message=Properties ('alphabet_partition',) were present in the 'ib_tickers' stream but not found in catalog schema. Ignoring. cmd_type=extractor name=tap-ibkr-tickers run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.723879Z [info ] Traceback (most recent call last): cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.724028Z [info ] File "/home/ubuntu/meltano_proj_repo/.meltano/loaders/target-postgres/venv/bin/target-postgres", line 8, in <module> cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.724268Z [info ] sys.exit(main()) cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.724393Z [info ] File "/home/ubuntu/meltano_proj_repo/.meltano/loaders/target-postgres/venv/lib/python3.10/site-packages/target_postgres/__init__.py", line 373, in main cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.724503Z [info ] persist_lines(config, singer_messages) cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.724621Z [info ] File "/home/ubuntu/meltano_proj_repo/.meltano/loaders/target-postgres/venv/lib/python3.10/site-packages/target_postgres/__init__.py", line 133, in persist_lines cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.724728Z [info ] primary_key_string = stream_to_sync[stream].record_primary_key_string(o['record']) cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.724841Z [info ] File "/home/ubuntu/meltano_proj_repo/.meltano/loaders/target-postgres/venv/lib/python3.10/site-packages/target_postgres/db_sync.py", line 337, in record_primary_key_string cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.725028Z [info ] flatten = flatten_record(record, self.flatten_schema, max_level=self.data_flattening_max_level) cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.725182Z [info ] File "/home/ubuntu/meltano_proj_repo/.meltano/loaders/target-postgres/venv/lib/python3.10/site-packages/target_postgres/db_sync.py", line 150, in flatten_record cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.725410Z [info ] if isinstance(v, collections.MutableMapping) and level < max_level: cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154639.725550Z [info ] AttributeError: module 'collections' has no attribute 'MutableMapping' cmd_type=loader name=target-postgres run_id=65de4c49-20c1-43bf-aa5a-7996fd78f90b state_id=ibkr-to-postgres-tickers stdio=stderr 2022-09-18T154640.088281Z [error ] Traceback (most recent call last): File "/home/ubuntu/.local/pipx/venvs/meltano/lib/python3.10/site-packages/meltano/core/logging/output_logger.py", line 201, in redirect_logging yield File "/home/ubuntu/.local/pipx/venvs/meltano/lib/pyth…

I think for now i will just back off from using Ubuntu 22.04 to 20.04 .. which comes with 3.8

I thought more on this and posted another comment: https://github.com/meltano/meltano/issues/3333#issuecomment-1251687959