SAP Message CACSIB392 - Maximum length of field &1 is &2

Diagnosis
The field &v1& that is used to access portfolio assignment (PFO) musthave a maximum length of &v2& characters/digits. However &v3&characters/digits are currently being used.

System Response
No assignments can be made for field &v1& to a field of length &v2&.Processing is terminated with an error message.