IVTC issue

While reversing the telecining of a stream manually (with yatta) I ran into two duplicate combed frames in a row. The issue being that they're both the same field, it contains necessary frame data, and nothing else to blend it against. Any filter I tried has either not worked, or yielded worse results. Not sure if something like this can be interpolated properly, any pattern changes don't fix it either.

Maybe someone knows of a filter or method to try.

Source frame -


Attempts to fix -