[Newbie] Problem while keying in data into zoho form

[Newbie] Problem while keying in data into zoho form

The following error message is seen at the bottom of form [t_517656000000011037] Exception occured while setting value in PreparedStatement for the Column [Contact_No_517656000000011794] Check whether the datatype for this column is given as specified in the data-dictionary .[t_517656000000011037] Exception occured while setting value in PreparedStatement for the Column [Contact_No_517656000000011794] Check whether the datatype for this column is given as specified in the data-dictionary