Cache details page:no possible to create entries with type uint32 and uint64

In cache details page, after choosing uint32 type for key and value, I am entering the max value for unsigned integer, i.e. 4294967295 but the console gives me error after trying to save the value (NumberFormatException). Also it accepts values with `-` sign.

The same happens with uint64 - I am writing max value for unsigned long and the systems give me NumberFormatException (see screenshot). Negative numbers are normally accepted which should not happen from my understanding.