Locking a single audio file into position

Hi. Not sure if this has been asked before.

When creating 5 minute radio programmes, I like to place a piece of outro music so that it ends exactly at the 5 minute mark. Then I make all the other audio components fit in before that.

Sometimes I accidentally move it, which is a bit annoying.

Is there any way to lock a single audio file in position, so I can’t move it? I know there is the sync lock function, which locks multiple files together. but I want to be able to safely move the other files around individually, while my outro music stays in position.

Thank you for your help.