Incompatible data types error while checking analytical view

Team

I am trying to create a analytical view, when i am checking i got the below error message.

Message :

          ZRAJ.CEA1_40:Data Type of the Columns in the Join KNA1.KUNNR(DECIMAL)_CE1IDEA.KNDNR(VARCHAR) are Incompatible

Further i went and checked the one of the attribute view which uses KNA1 table and found that the KUNNR field data type is Decimal and i went back and checked the table in the schema and found that the KUNNR field is of NVARCHAR type.

So i request you to please check and provide me the solution to resolve this issue and proceed further.

Thanks

Raj