Error occurs when SVN update file access is denied

Problem
When we use SVN to update some Word or Excel files, the "Access Denied" phenomenon may occur:

this is because the file has been opened and is in the state of being modified (unsaved), so the file is locked and the update fails.

Solution
First save the Excel file being modified, then return to the folder where the file is located, and then select from the menu:

TortoiseSVN --> Clean up...
The Cleanup window pops up:

click OK, and then re-Update.