Delete Report in Private Folders

Hi,

I am creating a batch to delete unused reports in my organization. My user has the "Manage All Private Reports and Dashboards" permission. I can't delete any private report using the API.

I get the message ",Failed to delete report with ID: HEREREPORTID, HTTP status code: 404, response body: [{"errorCode":"NOT_FOUND","message":"The data you're trying to access is unavailable.", "specificErrorCode":104}]".

I can find reports by SOQL(USING SCOPE ALLPRIVATE) without any problems, I can't delete them or see them in the folder. Is there any way to get rid of these reports? I also tried to remove them with destructive changes but it doesn't work either.

I would be grateful for help!