Message Oracle PLS-00639 - NCHAR/NVARCHAR2 cannot be byte length semantics

ERRORNCHAR/NVARCHAR2 cannot be byte length semantics
CAUSENCHAR/NVARCHAR can only be codepoint length sematics. BYTE qualifiers used with NCHAR is illegal: nc NCHAR(7 BYTE); name NVARCHAR2(10 byte);
ACTIONRemove BYTE qualifier to make it as codepoint length semantics