You can try to allow the user to type the value in the respective fields and then validation to trigger. make the below mentioned changes
1) Change Event Policy = None , by default is Auto PPR
2) set table property immediate = true
You can try to allow the user to type the value in the respective fields and then validation to trigger. make the below mentioned changes
1) Change Event Policy = None , by default is Auto PPR
2) set table property immediate = true