Ошибка в процедуре

--CREATE OR REPLACE PROCEDURE SUM_MR 
 
DECLARE DATE1 DATE;
        DATE2 DATE;
        count_zv NUMBER(20);
        sum_un NUMBER(20);
        inc_port varchar2(10);
        out_port varchar2(10);
 
cursor date_max IS 
    SELECT MAX(TO_DATE(DATE_TIME,'DD-MM-YYYY')) 
    FROM ccas_u.summr;
 
cursor sum_units IS 
        SELECT COUNT(*), SUM(units), TO_DATE(START_TIME,'DD-MM-YYYY'), incoming_route, outgoing_route 
        FROM ccas_u.raw_cdr_MR32
            WHERE START_TIME >TO_DATE(DATE1,'DD-MM-YYYY')
            AND START_TIME<TO_DATE(trunc(sysdate - 1,'month'))
       GROUP BY TO_DATE(START_TIME,'DD-MM-YYYY'), incoming_route, outgoing_route;
       
    
BEGIN
  
    OPEN date_max; 
    fetch date_max INTO DATE1;
    DBMS_OUTPUT.enable;
    DBMS_OUTPUT.put_line('date: ');
    DBMS_OUTPUT.put_line('date2: '||TO_DATE(DATE1,'DD-MM-YYYY'));
    close date_max;
    
    OPEN sum_units;
        --LOOP
            --EXIT WHEN sum_units%NOTFOUND;
            fetch sum_units INTO count_zv, sum_un, DATE2, inc_port, out_port;
            DBMS_OUTPUT.enable;
            DBMS_OUTPUT.put_line('date3: '|| count_zv);
            INSERT INTO summr (ZVONKOV, SUM_UNITS,  DATE_TIME, INCOMING_ROUTE, OUTGOING_ROUTE) VALUES (count_zv, sum_un, DATE2, inc_port, out_port);
        --END LOOP;
    close sum_units;
    
    
END;
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