SAP Message AQV153 - Unable to include field in a functional group

Diagnosis
You tried to insert a field in a functional group whose length exceeds999 characters, but the query can only process fields with a maximumlength of 999 characters.

Procedure
Define additonal fields whose length is less than 1000 characters inwhich the field contents can be distributed. You can insert theseadditional fields in functional groups.