Will they cancel my series of exams (jntuh)

Today I have STM supply exam (CSE r18) then exam started and I was writing everything was going well Then there comes attendance sheet and we have to sign and write our booklet number beside our picture. Me for fun signed and put some marks on my friends pictures like drawing eat rings and bottu on forehead, drawing mesaalu , etc . I use to do like this once in a while but today after everyone's sign completed invigilator saw the attendance sheet and because furious and started scolding us, he even took some of our booklet for some time He didn't singed our papers and no body of us reavled nothing But finally after constant checking up everything he caught me and took my paper (by the time I completed only 10 papers ) and sent me out So I can out and few minutes later my friends also came and they said me that the invigilator wrote something with red pen on your booklet. And also they were saying that the invigilator will make sure that he will cancel my series of all exams So someone tell me do they really cancel my exams Full series for just this small thing