I pulled data few times and although other parameters change, spread for EUR/USD was 0.01 every time. This is clearly error and undermines my trust to any other value in assets file.
Spread for EUR/USD being at least 100 times higher than it should be is only one stark example. It changes AR for Z1 from ca. 100% to -10%.

The problem is not that parameters in assets file change but, that at least one of them takes ridiculous value and I do not understand why.