you cannot lower a cid on an otp>49 only cid49 otp/cid50/51/52 erom cids can be lowered back to 49 but to do this you need EMMA access and seus2 professional meaning you got to work for sonyE or have acces to theyr service... so imposible...
or you can try cross flashing a erom cid 49 with cid 50/51/52 firmware like i did on my k310 when i turned to w200 erom cid remained 49 and flash cid changed to 52 so i can use it with far+sefp w/r setool2lite and other free flashers as k310 try on other models on your own risk k310@w200 tested method... the rest i dont know