Post correction will not work properly (mixing up input and output file groups)

[VolkerHartmann]

ocrd-cis-post-correct.sh -m mets.xml -p param.json -I OCR-D-GT-SEG-PAGE,OCR-D-OCR-TEST -O OCR-D-COR
11:43:28.793 INFO ocrd.workspace_validator - input_file_grp=['OCR-D-GT-SEG-PAGE', 'OCR-D-OCR-TEST'] output_file_grp=['OCR-D-GT-SEG-PAGE', 'OCR-D-GT-SEG-BLOCK-ALIGN']
Exception: Invalid input/output file grps:
Output fileGrp[@use='OCR-D-GT-SEG-PAGE'] already in METS!