[Koha] invalid data, cannot decode object

[dolf]

I'm getting the same error with one book. We also haven't seen this error
before version 19.05.
Here is the offending MARC record:

MariaDB [koha_rsc]> select * from biblio_metadata where biblionumber=39335;
*************************** 1. row ***************************
          id: 32057
biblionumber: 39335
      format: marcxml
      schema: MARC21
    metadata: <?xml version="1.0" encoding="UTF-8"?>
<record
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.loc.gov/MARC21/slim
http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd"
    xmlns="http://www.loc.gov/MARC21/slim">

  <leader>00588nam a22001931a 4500</leader>
  <datafield tag="999" ind1=" " ind2=" ">
    <subfield code="c">39335</subfield>
    <subfield code="d">39335</subfield>
  </datafield>
  <controlfield tag="001">264910</controlfield>
  <controlfield tag="003">OSt</controlfield>
  <controlfield tag="005">20190712083916.0</controlfield>
  <controlfield tag="008">130225s1966    dk ||||| |||| |||
0|eng||</controlfield>
  <datafield tag="040" ind1=" " ind2=" ">
    <subfield code="c">RSC</subfield>
  </datafield>
  <datafield tag="100" ind1="1" ind2=" ">
    <subfield code="a">Hammershaimb, E.</subfield>
  </datafield>
  <datafield tag="245" ind1="1" ind2="0">
    <subfield code="a">Some aspects of Old Testament prophecy from Isaiah to
Malachi /</subfield>
    <subfield code="c">by E. Hammershaimb.</subfield>
  </datafield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="a">Kp3s�benhavn :</subfield>
    <subfield code="b">Rosenkilde og Bagger,</subfield>
    <subfield code="c">1966.</subfield>
  </datafield>
  <datafield tag="300" ind1=" " ind2=" ">
    <subfield code="a">116 p. ;</subfield>
    <subfield code="c">24 cm.</subfield>
  </datafield>
  <datafield tag="490" ind1="0" ind2=" ">
    <subfield code="a">Teologiske Skrifter ;</subfield>
    <subfield code="v">4</subfield>
  </datafield>
  <datafield tag="630" ind1="0" ind2="0">
    <subfield code="a">Bible</subfield>
    <subfield code="p">O.T.</subfield>
    <subfield code="p">Prophets</subfield>
    <subfield code="x">Criticism, interpretation, etc.</subfield>
  </datafield>
  <datafield tag="650" ind1="0" ind2="0">
    <subfield code="a">Prophecy.</subfield>
  </datafield>
  <datafield tag="942" ind1=" " ind2=" ">
    <subfield code="2">ddc</subfield>
    <subfield code="c">BOOK</subfield>
  </datafield>
</record>

Could it be a unicode issue? See field $260a.



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