Problem with multiple MRU processes on a page

I have a page with 3 report regions. The first 2 are based on the same query with 2 different filters while the 3rd is based on a view on the same table the 1st 2 are based on.
I have created a MRU process for the 1st 2 regions that is active on both reports and it works perfectly fine. As soon as I make the 3rd report an updatable sql report everuthing breaks. The 2 updatable queries now throw htis error
Error in mru internal routine: ORA-20001: Error in MRU: row= 1, ORA-20001: ORA-20001: Current version of data in database has changed since user initiated update process. current checksum = "A13886FC420B931B80182B6DE0409BB5", item checksum = "74D6B272FE94C895054E4FB16E7B7FAB"., update "EIMS"."PLATE" set "PLATE_ID" = :b1, "PLATE_BARCODE" = :b2, "CREATED_BY" = :b3
Error
OK
as well as the 3rd one
Error in mru internal routine: ORA-20001: Error in MRU: row= 1, ORA-20001: ORA-20001: Current version of data in database has changed since user initiated update process. current checksum = "A13886FC420B931B80182B6DE0409BB5", item checksum = "74D6B272FE94C895054E4FB16E7B7FAB"., update "EIMS"."TAQMAN_PLATE_INFO_V" set "PLATE_ID" = :b1, "PLATE_BARCODE" = :b2, "CREATED_BY" = :b3
Error
OK
the 2 queries look like
select
htmldb_item.checkbox(10, p.plate_id) sel,
htmldb_item.checkbox(5, p.plate_id) parent,
p.plate_id plateID,
p.PLATE_ID,
     p.PLATE_BARCODE,
     p.PLATE_TYPE ,
     p.CREATED_BY ,
     p.CREATED_ON ,
     p.STATUS,
p.UPLOADED_ON,
     decode(p.FILENAME, null, 'N', 'Y') loaded
from plate p
where
plate_type not in ( 'zzz', 'yyy')
and
select p.PLATE_ID,
p.plate_id plateid,
     p.PLATE_BARCODE,
     p.PLATE_TYPE ,
     p.CREATED_BY ,
     p.CREATED_ON ,
     p.UPLOADED_ON,
     nvl(p.FILENAME, 'Not Loaded') filename,
     p.NAME,
htmldb_item.checkbox(11, p.plate_id) sel,
htmldb_item.checkbox(7, p.plate_id) parent,
htmldb_item.checkbox(6, p.plate_id) child,
p.STATUS
from plate p
where
plate_type = 'yyy'
the view for the 3rd region looks similar to
create or replace view zzz_plate_info_v as
select '***' as select_taqman,
htmldb_item.checkbox(23, p.plate_id) sel,
htmldb_item.checkbox(8, p.plate_id) child,
p.PLATE_ID,
p.plate_ID "Plate Id",
     p.PLATE_BARCODE,
     p.PLATE_TYPE ,
     p.CREATED_BY ,
     p.CREATED_ON ,
     p.STATUS,
     p.UPLOADED_ON,
     decode(p.FILENAME, null, 'N', 'Y') loaded,
pr.run_id assay_run
from plate p, plate_run pr
where p.plate_type = 'zzz'
and p.plate_id = pr.plate_id (+)
and the query is
select select_taqman,
PLATE_ID,
plate_ID "Plate Id",
plate_barcode,
sel,
status,
child,
plate_type,
created_by,
created_on,
uploaded_on,
loaded,
assay_run
from zzz_plate_info_v
This is very puzzling and frustrating. Any hints and suggestions are appreciated.

Thanks,
this answers my question. It is intersting to notes that I could split the update across 2 queries... but it fails if one adds a 3rd region. Now it would be nice if I can mimic the 3rd MRU using my own pl/sql code. Any example that you know and that can be used?
--Nabil

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