can not clear p0155pd code on 98 BMW E36

Question

Had p0155 code Replaced both 02 sensors after convertor. Ran test and had two codes, both were/are p0155. One code reads p0155pd. I can erase the p0155 but not the one that has pd after. If I run the engine the p0155 then comes back.
This car has both ports, the one under the dash and the one on right side under hood.