Video added to media playlist via blueprint - string appended with incremental number

I am using ‘add file’ via blueprint to add a video to a playlist using its title.
every time a video is added it appends a number to the title in playlist, I have attached images. Not sure why this is happening. Thanks in advance!

This is intentional. Since you’re adding plain file paths instead of media source assets, the playlist will create media source assets for you behind the scenes. In order to guarantee that the UObject name of each asset is unique, UE appends a number to it. Internally, the engine just increments a counter. Past numbers will not be reused.