The sfcache operations may display error messages in the caching log when the operation completed successfully (3611158)

The sfcache command calls other commands to perform the caching operations. If a command fails, additional commands may be called to complete the operation. For debugging purposes, the caching log includes all of the success messages and failure messages for the commands that are called.

If the sfcache command has completed successfully, you can safely ignore the error messages in the log file.