"java.lang.ArithmeticException: / by zero" AllowedTimePeriodDiscrepancy can not be zero

[alessandroAmedei]

I would like a code to be valid only for 30 second in its period:

        int MFA_PERIOD = 30;
        int MFA_ALLOWED_TIME_PERIOD_DISCREPANCY = 0;
        DefaultCodeVerifier verifier = new DefaultCodeVerifier(codeGenerator, timeProvider);
        verifier.setTimePeriod(MFA_PERIOD );
        verifier.setAllowedTimePeriodDiscrepancy(MFA_ALLOWED_TIME_PERIOD_DISCREPANCY);

But when i call the method "isValidCode" i get:

java.lang.ArithmeticException: / by zero
	at java.base/java.lang.Math.floorDiv(Math.java:1288)
	at dev.samstevens.totp.code.DefaultCodeVerifier.isValidCode(DefaultCodeVerifier.java:30)

I can get the same result doing:

MFA_PERIOD = 15;
MFA_ALLOWED_TIME_PERIOD_DISCREPANCY = 1;

        t|--------------|-----15sec----|
            ^generating otp xyz
        t|-----------------------------|
         xyz is valid for 30 secondi

But is this the correct solution?