ORA-01843: not a valid month ORA-06512: at line 22 ORA-01403: no data found

declare
  new_doc blob;
begin
  SELECT BLOB_CONTENT into new_doc 
     FROM WWV_FLOW_FILES
     WHERE NAME = :P7_DOC;

  insert into D_INF_PUB_VIE(CAPTION,ISSUE_DATE,src,Inf_type,doc,doc_title)
  values(:P7_CAPTION,
         :P7_ISSUE_DATE,
         :P7_SRC,
         :P7_INF_TYPE,
         new_doc,
         :P7_DOC_TITLE);
 
end;

'YYYY-MM-DD'

insert into d_inform_pub(id, 
                             id_type, 
                             caption, 
                             issue_date, 
                             body, 
                             iuser, idate)
      values( dip_new_id, dt_id, :new.caption, 
          to_date(:new.issue_date,'yyyy-mm-dd'), 
          :new.src, user,sysdate);

declare
  new_doc blob;
begin
  D_DB_UTILS_PKG.trace('до селекта',null);
  SELECT BLOB_CONTENT into new_doc 
     FROM WWV_FLOW_FILES
     WHERE NAME = :P7_DOC;

  D_DB_UTILS_PKG.trace('до делита',null); 
  delete FROM WWV_FLOW_FILES
     WHERE NAME = :P7_DOC;
  D_DB_UTILS_PKG.trace('до инсерта',null);  
  insert into D_INF_PUB_VIE(CAPTION,ISSUE_DATE,src,Inf_type,doc,doc_title)
  values(:P7_CAPTION,
         :P7_ISSUE_DATE,
         :P7_SRC,
         :P7_INF_TYPE,
         new_doc,
         :P7_DOC_TITLE);
         
  EXCEPTION   
  WHEN OTHERS THEN
      D_DB_UTILS_PKG.trace('зашли в exception',null);
      D_DB_UTILS_PKG.trace(:P7_CAPTION);
      -- D_DB_UTILS_PKG.trace(:P7_ISSUE_DATE,null);
      insert into D_INF_PUB_VIE(CAPTION,ISSUE_DATE,src,Inf_type)
      values(:P7_CAPTION,
             :P7_ISSUE_DATE,
             :P7_SRC,
             :P7_INF_TYPE);
      -- D_DB_UTILS_PKG.trace(to_char(:P7_ISSUE_DATE,'dd.mm.yyyy'),null);
end;

ORA-01861: literal does not match format string ORA-06512: at line 26 ORA-01403: no data found