Hello,

What screen is that on? What version and Patch you are using?

Regards,

The "LOT" data type is an alphanumeric type and the standard length is equal to 15 characters.

What I'm seeing in the picture is that the length of the value ("132121232.3213232") is greater than 15 characters. 

Try to trim the value to 15 char... perhaps the error message will disappear