Show if a filed and become blank based on previous field

[Soufiane_M]

Hi , I have two column , I make a condtion show_if in the second column based on the choice of the first colmun for exmple , if the first column equal “A” show the seconde column if it’s equal to “B” hide the seconde column , Until now it’s Ok, but when I type somthing in the second column data still always kept normally when I hide it the data should be deleted the filed should become blank