Creating POL from portfolio level should take the identifier from 020 and not from 776
When PO Line is created from the Portfolio level, ISBN comes from Marc21 field 776.
When PO Line is created directly from the bibliographic record, the ISBN comes from the first Marc21 field 020.
Desired behavior:
When PO Line is created from the Portfolio level, the ISBN should come from the first Marc21 field 020 (same as when PO Line is created directly from the bibliographic record).

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Christian commented
Dear Tamar,
is there any news about the idea yet?
Please let us know the date of the planned implementation.Kind regards,
Christian -
Christian commented
Dear Tamar,
this idea has now already received 135 votes :-)
We hope that this will lead to the implementation of the already accepted idea being added to the short-term roadmap.Thanks also to Diana and Laura for the additional notes. We had already discussed the relevant ISBN fields in our request to Ex Libris and it is also important that the correct ISSN is included in the PO line.
With a different idea to identifiers in PO Lines we had already made it into the 2nd Alma NERS voting round, but unfortunately did not receive enough votes:
PO Line: missing identifiers ISBN/ISSN/ISMN etc.
https://ideas.exlibrisgroup.com/forums/308173-alma/suggestions/46228312-po-line-missing-identifiers-isbn-issn-ismn-etcWe hope that this will be implemented soon ...
Thanks,
Christian. -
Laura Rounds commented
Please also include ISSN from the 022 and not the 776.
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Diana Brooking commented
Furthermore, the ISBN should also come from 020 subfield "a", to make sure it is the ISBN for the electronic version (assuming the user is selecting the correct bib for the electronic version). The 776 would point to the print version, as so would an 020 subfield "z".