Resave in the current version
If the current document was created in an older version of InDesign, the script resaves it in the current version adding a suffix: e.g. My File_2020.indd
It can also be used with the Batch processor to quickly upgrade a lot of files, like so:
Note: with this particular script, it is not necessary to make backups since it always creates new files leaving originals untouched.
Example of processing all files in a folder
Click here to download the script.
See also Resave files script