get an error about Field"Timeout" is not correct : a time unit is expected when im updating an item using SNMP agent type

Steps to reproduce:
i have setup an item using SNMP agent ( which is not reporting Disk data for this device even though I can see that data with snmpwalk) when I go to update any part of the item i get the error Field"Timeout" is not correct : a time unit is expected
We are using version 5.0.6

Result:
See screenshot...

Expected:
I expect to be able to update an item without getting an error for a field thats not on the page