A file attached to a document entitled 'Selected papers' is larger than the maximum file size of 50M

Hello, I have an document in my research journal folder that is larger than 50MB. Every time I open Mendeley I get the following message: "A file attached to a document entitled 'Selected papers' is larger than the maximum file size of 50MB and has not been synced." I would like to somehow turn off syncing for this document. I tried selecting the "exclude from Mendeley Web Catalog" option but that doesn't seem to work. In the log file, I get the following error: Error Type: FILESIZELIMITEXCEEDED Is it possible to turn off syncing for this item? Ben