Oracle 11g Release 2

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create or replace TYPE type1 AS OBJECT
  (order_date     DATE
  ,order_status   VARCHAR2(50)
  ,offer          NUMBER
)
ALTER TYPE type1 MODIFY ATTRIBUTE (order_status   VARCHAR2(20));
ORA-22324: altered type has compilation errors
ORA-22328: object "FIDDLE_KBSCFHTBHKNSUPZCROOJ"."TYPE1" has errors.
PLS-00719: only widening of attribute 'ORDER_STATUS' constraints is allowed
ORA-06550: line 0, column 0:
PL/SQL: Compilation unit analysis terminated

ALTER TYPE type1 MODIFY ATTRIBUTE (order_status   VARCHAR2(60));
ALTER TYPE type1 MODIFY ATTRIBUTE (offer  VARCHAR2(20));
ORA-22324: altered type has compilation errors
ORA-22328: object "FIDDLE_KBSCFHTBHKNSUPZCROOJ"."TYPE1" has errors.
PLS-00719: only widening of attribute 'OFFER' constraints is allowed
ORA-06550: line 0, column 0:
PL/SQL: Compilation unit analysis terminated