Table T511 how to update KOMBI Value

Hello,

We are having an issue with Membership Fees IT0057 whereby even though we have set in screen control the field for the actual fee to be OF Optional Field, for South Korea we are getting an error message saying it is mandatory.

This only happens for South Korea, not our 24 other locations.

I have tracked this down to table T511 field KOMBI (combination check).

All our other country entries have '9' "Amount optional, no number/unit".  However for South Korea MOLGA 41 this value is set to '1' "Amount required, no number/unit."

I cannot find anywhere in SPRO how to change this value.

Can anyone tell me how I can change this value?

Many Thanks

David