If a state supreme court creates a precedent, must federal trial courts follow it?

In the United States, state courts are not considered inferior to federal courts but rather constitute a parallel court system. When a federal court rules on an issue of state law, the federal court must follow the precedent of the state courts, under the Erie doctrine. Each district court thus follows precedents handed down by the Supreme Court and by the court of appeals in the circuit encompassing the district court.

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In the United States, state courts are not considered inferior to federal courts but rather constitute a parallel court system. When a federal court rules on an issue of state law, the federal court must follow the precedent of the state courts, under the Erie doctrine...Also Can I have brainliest

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