Meeting ID errors

Hi there,

I teach on zoom each week, and send out 8 links 4-5 days before the meeting each Friday.

When I then go to that meeting on Friday and try to open it, it says 'incorrect meeting ID' and won't open.

I usually then panic - and re-send links to participants and ask them to ignore the previous link.

However, why is this happening?  How can I avoid this as it feels like i am confusing my students... something is going wrong,

with kind wishes and thanks

ann