SAP Message AD695 - Field & (use other data type in pool key)

Diagnosis A key field of the pool has an incorrect data type. Only characterlikedata types are permitted for key fields. Procedure Change the data type of the particular key field to one of thepermissible data types CHAR, NUMC, ACCP, CLNT, CUKY, DATS, TIMS, LANG orUNIT. Further information about the data types can be found in themanual for the ABAP/4 Dictionary.