[Python] Sympy solve solutions missing

Sympy's solve method doesn't return all solutions on this relatively simple problem:

import sympy as sp
y1, y2, x = sp.symbols('y1 y2 x')

y1 = x**2
y2 = x

sp.solve(y1, y2, dict = True)


This returns [{x: 0}] but there should be an x=1 solution as well.

Am I using this correctly?

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