Yes. Per the comprehensive notes and rules for Solemnity:
If the cost of an ability or an additional cost of a spell requires putting counters on an artifact, creature, enchantment, or land; that cost can’t be paid. If a resolving spell or ability says that a player may put counters on one of those objects, that player can’t choose to do so.
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u/Jabamaca 8d ago
What happens if you have to sacrifice it?