Command to don't add tags, or remove tags. Problem with tags in macros.

Audacity 3.1.3
When I convert wav files to FLAC using a macro it happens something strange. After the 2nd/3rd file of the list, the following files are filled in the metadata with a tag as track name or artist, which is somewhat taken from the name of other files from the list. If I apply the macro to files manually, one by one, it doesn’t happen.
Is there a command that I can add in the macro to don’t add, or to remove any tags when exporting files?