You are not authorized to change Material description

Dear Experts,

I have an issue , that I am using one user id which has

SAP_ALL

SAP_NEW

T_YB250030

T_YB250045

profile .

But when I go to MM02 and try to change the description of the selected material it gives error: You are not authorized to change Material description

When I do su53 on that screen I get this message : The last authorization check was successful

Can you please tell me what role or profile am I missing ? adding which to my userid I would be able to do changes to MM master data?

Thanks in advance.