If they are indeed bigints, then it should not throw that error. Verify that it is so by running this query and a similar one for C_ID (or looking up in SSMS object explorer)
SELECT OBJECT_NAME(Object_id),c.name AS ColumName, t.name AS DataType
FROM sys.columns c
INNER JOIN sys.types t ON t.system_type_id = c.system_type_id
WHERE OBJECT_NAME(Object_id) = 'Table_Customer_Records'
AND c.name = 'ID'