This error is reported during SAP® synchronization using the Transfer data to SAP® Solution Manager option. You have tried to add a documentation to a project that was already assigned a document of the same type on the same tab.
Error message
Document <name of document> was skipped because the assigned document type <type> is already being used for another document that is assigned to the same project node on the same document tab.
Cause
In SAP® Solution Manager, documents of one document type must be used only once for a project node on a document tab.
You select the relevant document types on the options page SAP® options > Document types (ARIS > Options).
Solution
Change the project settings in the SAP® system.
Change the document type in ARIS.
Decide which document is to be entered on the tab. If you want to use the document that caused the error, delete the existing document manually from SAP® Solution Manager and restart the action.