OMIDs for agent roles instead of responsible agents in Meta CSV "author" field

[eliarizzetto]

In version 8 (https://doi.org/10.6084/m9.figshare.21747461.v8) and version 9 (https://doi.org/10.6084/m9.figshare.21747461.v9) of the OpenCitations Meta CSV dump, the author field of some of the resources erroneously contains OMIDs of agent roles (prefixed by "/ar") instead of OMIDs of responsible agents (prefixed by "/ra").
For example, the following row, storing metadata for br/06602041963, contains three agent roles in the author field:

id	title	author	issue	volume	venue	page	pub_date	type	publisher	editor
omid:br/06602041963 doi:10.33029/9704-6031-3-2021-1-432 openalex:W4244840417	CLINICAL PHARMACOLOGY. Obstetrics. Gynecology. Infertile Marriage	[omid:ar/06609023674]; [omid:ar/06609023675]; [omid:ar/06609023673]			CLINICAL PHARMACOLOGY. Obstetrics. Gynecology. Infertile Marriage [omid:br/06602042953]	1-432	2021	book chapter	Geotar-Media Publishing Group [omid:ra/0610116993 crossref:18453]	Radzinskiy, E.V. [omid:ra/06606217946]; Shykh, E.V. [omid:ra/06606217947]

CSV rows with a faulty value in the the author field are 7,607,734 in version 8 and 8,105,378 in version 9. Such errors in the CSV files are not observable when the same data is accessed via API (see e.g. https://opencitations.net/meta/api/v1/metadata/omid:br/06602041963).

Based on the study of randomly sampled cases (including the one mentioned above), my guess is that the following conditions hold also for the rest of the rows interested by the phenomenon:

• no author is available for the bibliographic resource (neither in the CSV file nor in the triplestore accessible via SPARQL endpoint);
• the OMIDs of the roles mistakenly mentioned in the author field are the OMIDs of the roles of the other contributors linked to the bibliographic resource, i.e. the publisher(s) and the editors (see all the contributors of br/06602041963 as they are recorded in the triplestore);
• the publisher and the editor fields contain the correct data, i.e. the name and IDs (including OMID) of the publisher(s) and the editor(s), despite the fact that the entities of the roles, which should not be represented at all in the CSV dump, are stored in the author field. E.g., the role of publisher of br/06602041963, identified by ar/06609023673, is rightly linked to the agent ra/0610116993 in the triplestore, which is correctly mentioned in the CSV row and is the actual publisher of the publication in question.