[Python] Pandas replace from dictionary and regex not working

I am noticing a strance bahavior in the pandas replace function when trying to pass a dictionary with dictionaries as so:

mutual_format = {'col1' : {'(?i)o':'0', '[^\d)]':''},
'col2' : {'name ':''}}

df.replace(mutual_format, regex=True)


In this case, the col 2 replacement works, however th first one is completly ignored. What am I doing wrong?

col1 | col2
0004564321 / O name asdfg asd as
00045632145 / O name bla bla
00045632145 name asdf asdf

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