Cache warming error from Anthropic with thinking

[samteezy]

Issue

Here's the error message that I get periodically with cache-keepalive-pings: 1

Cache warming error: litellm.BadRequestError: AnthropicException - {"type":"error","error":{"type":"invalid_request_error","message":"messages.127.content.0.type:
Expected thinking or redacted_thinking, but found text. When thinking is enabled, a final assistant message must start with a thinking block. We recommend
you include thinking blocks from previous turns. To avoid this requirement, disable thinking. Please consult our documentation at
https://docs.anthropic.com/en/docs/build-with-claude/extended-thinking"}}

Version and model info

Aider v0.77
Anthropic 3.7 Sonnet with thinking and caching enabled