query – oracle pl/sql block throwing ORA-00922: missing or invalid option

I have the following segment of oracle pl/sql block

    rec all_tab_columns%ROWTYPE;
    v_tableName VARCHAR2(100);
    v_columnName VARCHAR2(100);
    v_schemaName VARCHAR2(100);
    v_schemaName := 'TESTNEW';
    EXECUTE IMMEDIATE 'create table '||v_schemaName||'.table_column_mapping_8(table_name varchar2(100), column_name varchar2(100));';
    for rec in (
        SELECT table_name, column_name FROM all_tab_columns WHERE identity_column = 'YES' AND OWNER = v_schemaName
    ) LOOP
         v_tableName := rec.table_name;
         v_columnName := rec.column_name;

        EXECUTE IMMEDIATE 'insert into ' ||v_schemaName||'.table_column_mapping_8 values('''||v_tableName||''', '''|| v_columnName ||''');';
      END LOOP;

As I try running this, I get the following error:

Error report –
ORA-00922: missing or invalid option
ORA-06512: at line 8
00922. 00000 – “missing or invalid option”

Looks like something is wrong at the execute immediate statment

Tried to google it and found this:

Couldn’t find the real cause.

Can someone help here?

Thanks in advance