Model class without restraints from initial pdb  failed.

/net/marbles/raid1/dorothee/rerefine/cryoem/data_no_H/7spb_24769/12_2023/7spb_24769.pdb /net/marbles/raid1/dorothee/rerefine/cryoem/data_no_H/7spb_24769/12_2023/7spb_24769.map 3.31
Traceback (most recent call last):
  File "/net/marbles/raid1/dorothee/rerefine/cryoem/rerefine_script.py", line 952, in get_composition
    log              = null_out())
  File "/net/cci-filer2/raid1/xp/phenix/phenix-1.21rc1-5172/modules/cctbx_project/mmtbx/model/model.py", line 244, in __init__
    self._ss_annotation = self._model_input.extract_secondary_structure()
  File "/net/cci-filer2/raid1/xp/phenix/phenix-1.21rc1-5172/modules/cctbx_project/iotbx/pdb/__init__.py", line 1197, in extract_secondary_structure
    return secondary_structure.annotation.from_records(records, log)
  File "/net/cci-filer2/raid1/xp/phenix/phenix-1.21rc1-5172/modules/cctbx_project/iotbx/pdb/secondary_structure.py", line 627, in from_records
    sh = pdb_sheet.from_pdb_records(sh_lines)
  File "/net/cci-filer2/raid1/xp/phenix/phenix-1.21rc1-5172/modules/cctbx_project/iotbx/pdb/secondary_structure.py", line 2513, in from_pdb_records
    s = pdb_strand.from_pdb_record(r)
  File "/net/cci-filer2/raid1/xp/phenix/phenix-1.21rc1-5172/modules/cctbx_project/iotbx/pdb/secondary_structure.py", line 2214, in from_pdb_record
    sense=int(line[38:40]))
  File "/net/cci-filer2/raid1/xp/phenix/phenix-1.21rc1-5172/modules/cctbx_project/iotbx/pdb/secondary_structure.py", line 2190, in __init__
    raise Sorry("Bad sense in SHEET record: '%s'" % sense)
Sorry: Bad sense in SHEET record: '6'