OJS update (from 3.3.0 to 3.4.0) fails: `a foreign key constraint fails: doi_settings_doi_id_foreign`

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3

Okay, got the following results from my tests:

Array
(
    [doi_id] =>
    [datacite::registeredDoi] => ****removed****
    [datacite::status] => registered
)
missing2
Array
(
    [doi_id] =>
    [datacite::registeredDoi] => ****removed****
    [datacite::status] => registered
)
missing2
Array
(
    [doi_id] =>
    [datacite::registeredDoi] => ****removed****
    [datacite::status] => registered
)
missing2
Array
(
    [doi_id] =>
    [datacite::registeredDoi] => ****removed****
    [datacite::status] => registered
)
missing2
Array
(
    [doi_id] =>
    [datacite::registeredDoi] => ****removed****
    [datacite::status] => registered
)
missing2
Array
(
    [doi_id] =>
    [datacite::registeredDoi] => ****removed****
    [datacite::status] => registered
)
missing2
Array
(
    [doi_id] =>
    [datacite::registeredDoi] => ****removed****
    [datacite::status] => registered
)

Thats from a print_r($item) in my mentioned if from above.