How to roll over deposit at notice with zero interest rate ?

Hello All,

There is a requirement from client that they want to roll over deposit at notice with zero interest rate (Tcode TM14).

However when we enter zero in interest percentage rate field, system still ask us to enter the interest rate (Error message number T4034) being a mandatory field.

Following are additional details:

Product Type   = 52B

Transactn Type = 100

Condition Type = 1200

Activity =  801

Do you know how to roll over a deposit at notice with zero interest rate in TM14?

Is it possible to create new condition type which will allow zero interest for a deposit at notice at the time of roll over?

Thanks,

Vaishali