bigint error using USD currency columns on stateless form

bigint error using USD currency columns on stateless form

I am trying to capture changes to a currency (USD) data type column on a stateless form and get the following error when trying to save the script with this statement (x.Pay_1_Amt=input.Pay_1_Amt;).  Both columns are USD currency data type columns as near as I can tell......
 
Error in statement at line number 6 The field x.Pay_1_Amt is of type BIGINT. But you are trying to update it with data of type DECIMAL
 
Any suggestions are much appreciated.  Thanks.