Yes it is a work around.
But considering your example from the other topic, I understand now that the problem is because of an over constrain between fix and horizontal. Since the line is fixed it is fully constrained and there is no need to precise that it is horizontal.
For example, the same error will appear if you fix one point, and then the line.
Just remove the horizontal constrain (click the H, then Delete key) and the error will disappear.
Note that Horizontal and Vertical constrains are added automatically to help the user, this behavior can be deactivated in the Sketch panel (check box automatic constraints)
