  We prove a lower and an upper bound for the large sieve with square moduli
for function fields. These bounds correspond to bounds for the classical large
sieve with square moduli established in arXiv:1812.05844 by Baier, Lynch and
Zhao and arXiv:math/0512271 by Baier and Zhao. Our lower bound in the function
field setting contradicts an upper bound obtained in arXiv:1802.03131 by Baier
and Singh. Indeed, we point out an error in arXiv:1802.03131.
