BMW E81 1.6 N43B16 MSD81.2 need DTC OFF

[Apsik]

Hi

I have a BMW E81 1.6 with modified exhaust and DTC 2A26 pops up often. Probably it's because the 2nd CAT is removed. In addition can you please delete the NOX sensor too?? I'm not familiar with this ECU at all.
Another DTC which is present in this ECU is: CDAF

Here is the read:
409635

[Act Tuning]

you removed both lambda sensors ??

[Apsik]

First sensor and CAT are in place. The 2nd one is also pluged in but the middle CAT is removed.
It is stainlessteel catback exhaust

[Act Tuning]

Here Lambda removed, see if it help you.