Did the Matlab solver make a mistake?

I fed this equation into the Matlab terminal:

syms y v w i s
eqn = y/s-i/s == (y^2*w^2/v^2-w^2)^(1/2)

eqn = 

sol = solve(eqn, y)

Warning: Solutions are only valid under certain conditions. To include parameters and conditions in the solution, specify the 'ReturnConditions' value as 'true'.

sol = 

sol1 = solve(eqn, y, 'returnconditions', true)

sol1 = struct with fields:
             y: [2x1 sym]
    parameters: [1x0 sym]
    conditions: [2x1 sym]

sol1.y

ans = 

sol1.conditions

ans = 

and got these two solutions, the two intersection points of a hyperbola with a straight line:

-(v*(i*v + s*w*(i^2 + s^2*w^2 - v^2)^(1/2)))/(s^2*w^2 - v^2)

-(v*(i*v - s*w*(i^2 + s^2*w^2 - v^2)^(1/2)))/(s^2*w^2 - v^2)

the first solution did the trick but the second only after I removed the minus sign at it's beginning - that's besides the next minus sign that replaces the plus in the first solution

a big thank you for all the support I received from you in the past