Error while merging site rules to existing site from configuration backup

[001appsec007]

Merging site rules...
Traceback (most recent call last):
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\runpy.py", line 87, in run_code
exec(code, run_globals)
File "C:\Users\xxxxx\AppData\Local\Programs\Python\Python39\Scripts\sigsci_site_manager.exe_main.py", line 7, in
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\site_manager.py", line 449, in main
args.func(args)
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\site_manager.py", line 105, in do_merge
merge(api, site, args.src_site, args.file_name,
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\merge.py", line 420, in merge
merges(api, dst_site, data, categories)
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\merge.py", line 405, in merges
steps[k]0
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\merge.py", line 159, in merge_site_rules
if equal_rules(rule, item):
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\util.py", line 97, in equal_rules
a = filter_data(in_a, keys)
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\util.py", line 17, in filter_data
ret = {k: data[k] for k in keys}
File "c:\users\xxxxx\appdata\local\programs\python\python39\lib\site-packages\sigsci_site_manager\util.py", line 17, in
ret = {k: data[k] for k in keys}