Incorrect BeginString set in quickfix.fix50.Message class [getHeader().setField(new BeginString("FIXT.1.1"));

The BeginString is mistakenly set to 'FIX.1.1' in the quickfix.fix50.Message class. In other Message classes in the packages quickfix.fix* it is correctly set.
Solution: getHeader().setField(new BeginString("FIXT.5.0"));