I hope I'm not confusing you with this. It's impossible to predict short term rate movements (or I'd be in a different job!) so all I can do is point out different things that could happen.
Ok, so you're current break fee of 450 means that the 2 year rate now is about 0.11% lower than the 3 year rate was when you fixed. Sounds right. This quote could change daily if interbank rates move.
Let's say you've 6 weeks left - what does the lower rate save you? 210k*.3%*6/52 = 73 euro
If you break now, you pay a 450 break fee & save 72 Interest, but run the risk of another break fee to end the 1 year rate early. What might that be? You'd be looking at the 12 month interbank rate, which is currently -0.178%. This year to date it's operated within a range of -0.178 to -0.191, so relatively stable. If rates fall, you'll have a break fee. If they fell 0.05% in the 6 weeks (an extreme case given range rates have stayed within), you'd have an additional break fee of 105 (and you'll have saved 70 interest). If they remain as they are, or rise, you'll have no additional break fee.
If you don't break now, there are 2 scenarios:
1. The 2 year interbank rate falls. for every 0.01% fall it will cost you 42 euro.
2. The interbank rate rises. every 0.01% will reduce the 450 break fee you were quoted by 42 euro.
The 2 year rate has been stable within a narrow range, so unless there's something unexpected in the market, it's not going to move by more than about 0.05% in such a short term (again an extreme). It dropped a bit in late May when the trade war between US & EU escalated, but you're talking about 0.04% movement from min to max in 3 months from May - July.