Data type conversion warning from decimal(3,0) to decimal(3,0)

Hi Experts,

     I am getting a strange warning like the one i mentioned below.

[Query:Q_Format_Row]

The data type conversion will be used to convert from type <decimal(3,0)> of mapping expression <to_decimal_ext( Q_Check_Key_Translations.RESIDENT_STATE_DST,'.','',3,0)> to type <decimal(3,0)> of target column <RESIDENT_STATE_DST>. (BODI-1110410)

Here the target column is of data type Decimal(3,0) and the source is varchar(30). I tried both cast function and to_decimal_ext. But I am getting same warning. Please help me out

Thanks & Regards

Alex Oommen