Hi Rusyinni,
I was able to add an entry.
First I created role category under below path:
Real Estate--> Partner Data-->Controlling Business Partner Maintenance-->Role categories and Role types
Maintain Z009 under defined role category.
I then created text id under below customizing:
Path : Real Estate -->Partner data-->General data on Business partners-->Notes on business partners.
In the first two nodes, Business partner: Notes (role) & Business partner: Notes (general) I created the text id ZZ01 under both the nodes.
In the 3rd node, Business partner: Customizing role category - text ID, I then created the below entry:
Mapped the customer defined role category Z009 to ZZ01 text ID.
Regards,
Amar