Vue warn: Duplicate keys detected: '2'

[vandroids]

Hi!

Got this error in my browser console. Can you please fix it?

Details:
I'm showing multiple success notifications at different times asynchronously (for example, after uploading each of multiple files), probably the problem lies here:

methods: {
            showMe(obj){
                const item = {
                    id: this.list.length,

Seems like this.list.length is not a reliable source for unique ID. Maybe it's better to use RNG so that the problem will completely fly away?