Cannot open any workbook after deleting one of them

Hi,

One of workbooks in my solution became unnecessary and I'd removed it in configuration and then patched the solution. That workbooks had an "fcset" name. After removing and trying to open one of the workbooks rest I saw the message that is presented on the screenshot.

That happened when attempting to open workbooks from a user account. From admin account everything worked fine.

After I inserted a temporary workbook with the similar name, everything started working fine.

How to delete temporary workbook and avoid error message?